tag:blogger.com,1999:blog-31558497109102759612024-03-04T22:07:04.812-08:00BLOG PEMBELAJARAN BIOLOGIBlog ini berisi materi-materi pelajaran biologi SMA, SMK, SMP dan UMUMAnonymoushttp://www.blogger.com/profile/04734618468163115287noreply@blogger.comBlogger9125tag:blogger.com,1999:blog-3155849710910275961.post-20466339689444599632013-04-12T19:19:00.005-07:002013-04-12T19:19:44.378-07:00Echinodermata<br />
<div style="text-align: justify;">
<i> Echinodermata</i> berasal dari bahasa Yunani, yaitu dari kata echinos yang artinya duri dan derma yang artinya kulit. Jadi echinodermata berarti hewan berkulit duri<i>. </i>Echinodermata adalah filum hewan terbesar yang tidak memiliki anggota yang hidup di air tawar atau darat. Hewan-hewan ini juga mudah dikenali dari bentuk tubuhnya: kebanyakan memiliki simetri radial, khususnya simetri radial pentameral (terbagi lima)<i>. </i>
<br />
<br />
<i>Ciri-ciri umum Echinodermata<i> </i>:</i><br />
<ul>
<li>Habitat -- air laut</li>
<li>Makanan -- organisme kecil atau sisa-sisa organisme mati</li>
<li>Tubuh bersegmen/Beruas-ruas</li>
<li>Pada waktu larva tubuhnya simetri bilateral tapi pada saat dewasa simetri radial</li>
<li>Mempunyai kaki amburakral (kaki buluh), tidak mempunyai kepala dan tidak mempunyai otak</li>
<li>Epidermisnya halus dan diperkuat oleh kapur yang disebut lamina (osikula) </li>
</ul>
<b>Sistem organ Echinodermata.</b><br />
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<td style="border-bottom: solid windowtext 1.0pt; border-left: none; border-right: solid windowtext 1.0pt; border-top: none; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 336.2pt;" width="448"><div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; text-align: justify; text-justify: inter-ideograph;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Sistem
sirkulasi radial mengalami reduksi, selom biasanya luas berisi sel-sel
amebosit. Pada saat lava rongga tubuh berfungsi sebagai sistem vaskular air
dengan kaki ambulakral. Sistem ini dipakai untuk berjalan, bernapas, ekskresi
dan menagkap mangsa.</span></div>
</td>
</tr>
<tr style="mso-yfti-irow: 3;">
<td style="border-top: none; border: solid windowtext 1.0pt; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 125.9pt;" width="168"><div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Sistem
pernapasan</span></div>
</td>
<td style="border-bottom: solid windowtext 1.0pt; border-left: none; border-right: solid windowtext 1.0pt; border-top: none; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 336.2pt;" width="448"><div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; text-align: justify; text-justify: inter-ideograph;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Sistem
pernapasan berbeda-beda pada setiap anggota kelompok echinodermata. Ada yang
menggunakan kaki tabung, insang kecil atau pohon respirasi.</span></div>
</td>
</tr>
<tr style="mso-yfti-irow: 4;">
<td style="border-top: none; border: solid windowtext 1.0pt; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 125.9pt;" width="168"><div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Sistem
reproduksi</span></div>
</td>
<td style="border-bottom: solid windowtext 1.0pt; border-left: none; border-right: solid windowtext 1.0pt; border-top: none; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 336.2pt;" width="448"><div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; text-align: justify; text-justify: inter-ideograph;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Reproduksiya
ada yang secara seksual dan ada juga secara aseksual. Secara aseksual yaitu
dengan regenerasi atau dengan pembelahan sel. Reproduksi seca seksual dengan
fertilisasi telur dan sperma di dalam air (fertilisasi eksternal). Alat
kelaminnya diesis. Pada fertilisasi eksternal, dihasilkan larva yang
mikroskopis, bersilia, dan bersifat medusa (berenagng bebas). Larva telah
mempunyai sistem pencernaan yang lengkap.</span></div>
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</tr>
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<td style="border-top: none; border: solid windowtext 1.0pt; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 125.9pt;" width="168"><div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Sistem
saraf</span></div>
</td>
<td style="border-bottom: solid windowtext 1.0pt; border-left: none; border-right: solid windowtext 1.0pt; border-top: none; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 336.2pt;" width="448"><div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; text-align: justify; text-justify: inter-ideograph;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Sistem
saraf berupa cincin di sekitar mulut dan berupa sistem saraf radia.</span></div>
</td>
</tr>
</tbody></table>
<br />
<i>Klasifikasi Echinodermata<i> </i>:</i><br />
<ol>
<li><a href="http://blogpembelajaranbiologi.blogspot.com/2013/04/asteroidea.html">Asteroidea</a> (Bintang laut)</li>
<li><a href="http://blogpembelajaranbiologi.blogspot.com/2013/04/ophiuroidea.html">Ophiuroidea</a> (Bintang Ular)</li>
<li><a href="http://blogpembelajaranbiologi.blogspot.com/2013/04/echinoidea-landak-lautbulu-babi.html">Echinoidea</a> (Landak Laut)</li>
<li><a href="http://blogpembelajaranbiologi.blogspot.com/2013/04/holothuroidea-tripangtimun-laut.html">Holothuroidea</a> (Tripang)</li>
<li><a href="http://blogpembelajaranbiologi.blogspot.com/2013/04/crinoidea.html">Crinoidea</a> (Lili Laut)</li>
</ol>
<i>Peranan Echinodermata Dalam Kehidupan</i><br />
<br />
Menguntungkan:<br />
<ul>
<li>Bulu babi dapat diambil gonadnya untuk dikonsumsi. Jepang memiliki peternakan bulu babi yang luas. Di wilayah Indonesia, terdapat di Nusa Tenggara Timur (NTT) dan Kendari.</li>
<li>Holothuria (mentimun laut) diperdagangkan sebagai teripang kering atau kerupuk teripang. Hongkong merupakan pusat perdagangan teripang dunia. Di negeri China, mentimun laut dikeringkan dan dimanfaatkan sebagai bahan obat-obatan. </li>
<li>Selain di konsumsi, tripang juga mulai dijadikan bahan pengobatan alternatif dengan nama populer jeli gamat. Didalam tripang terkandung kolagen, Mucopolusacharida (MPS), Docosahexaenoic Acid (DHA) sehingga dapat mengobati beberapa penyakit seperti sirisis hati, migren, luka, hepatitis dan jantung koroner<i>. </i></li>
<li>Echinodermata merupakan detritivor atau pemakan detritus (sisa organisme mati), oleh karena itu berguna untuk membersihkan laut dari sampah organik<i>. </i></li>
</ul>
Merugikan:<br />
<ul>
<li>Bintang laut sering memakan kerang mutiara di tempat budidaya kerang mutiara.
</li>
<li>Achanbasther merupakan hama pada terumbu karang, karena memakan polip Coelenterata. </li>
</ul>
</div>
<br />
<br />Anonymoushttp://www.blogger.com/profile/04734618468163115287noreply@blogger.com4tag:blogger.com,1999:blog-3155849710910275961.post-80135254573519577112013-04-12T19:08:00.004-07:002013-08-16T10:55:52.392-07:00Asteroidea<div style="line-height: 2em; text-align: justify;">
Di sebut asteroidea karena tubuhnya menyerupai bintang. Habitat yang di huni bintang laut adalah daerah pantai atau dasar laut yang tidak terlalu dalam. Di permukaan kulit tubuh bintang laut terdapat duri-duri dengan berbagai ukuran. Oragan-organ tubuhnya bercabang ke seluruh lengan.
Permukaan tubuh bagian dorsal berkulit duri tumpul dan tersusun dari zat kapur. Di bagian dasar, diantara duri-duri terdapat catut/jepit atau pediselaria yang merupakan modifikasi dari duri. Pediselaria berfungsi untuk menangkap mangsa, melindungi insang dermal, dan mencegah agar tubuh tidak tertimbun kotoran (Serpihan organisme kecil lain), pasir atau lumpur.
Penyokong tubuh tersusun dari lembaran kapur (Osikula). Di bagian dorsal tubuh hewan ini terdapat anus, sedangkan di bagian ventralnya terdapat mulut (Oral). Mulut di kelilingi oleh membran peristom dengan lima alur ambulakral pada lengan. Pada setiap alur terdapat dua atau empat deret kaki, yang juga dilengkapi otot serabut.<br />
Sistem vaskular air (Ambulakral) merupakan bagian dari selom yang fungsinya adalah untuk bergerak, melekat pada karang, menangkap mangsa, pertukaran gas, dan ekskresi. Sistem vaskular air di mulai dari Madreporit, yaitu keping atau saringan termpat masuknya air.
Struktur selanjutnya adalah saluran batu yang menuju ke bawah dan berhubungan dengan saluran cincin (Saluran melingkar) yang melingkari daerah mulut. Pada sebelah dalam saluran cincin terdapat sembilan tonjolan yang disebut badan Tiedman. Tonjolan ini diperkirakan sebagai tempat berkembangnya sel amebosit dalam sistem vaskular ini. Pada tiap lengan dari setiap saluran radial terdapat saluran pendek yang disebut saluran lateral. Saluran ini membentuk kaki Ambulakral dan Ampula.
Gerakan asteroidea terjadi saat air memasuki madreporit, saluran batu, saluran cincin, dan kemudian saluran radial yang selanjutnya menekan ampula sehingga kaki-kaki ambulakral dapat bergerak. Dalam hidupnya, bintang laut memiliki gejala Autonomi karena memiliki daya regenerasi yang besar. Sebagai contoh, jika sebuah lengan terluka maka biasanya akan dilepaskan. Lengan tersebut akan segera membentuk bagian tubuh yang terlepas sehingga utuh kembali. Beberapa spesies anggota Asteroidea antara lain <i>Astropecten irregularis, Crossaster papposus, Achantaster planci,</i> dan <i>Linckia laevigatus</i> (Bintang laut biru, berlengan panjang), <i>Pentaceros</i> (bintang laut tanduk, berlengan pendek), <i>Cultica</i> (bintang laut berkulit, tidak berlengan).
<br />
<div>
<table cellpadding="0" cellspacing="0" class="tr-caption-container" style="float: left; margin-right: 1em; text-align: left;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEge6Dd3pLKE9oQFlSLmzZm6m4oPWxfQhOItxyUypohP5lEXQQNCskDNQdoY8qCWarIEk1Bu_QvXSi66cxtrT_fAZQZN_6NV3f6J_Gyi4yMyVxekZRHlzqzI7yYQMyeevGMKVxYBSkltcHA/s1600/156030-Blue+Starfish-Linckia+laevigata.jpg" imageanchor="1" style="clear: left; margin-bottom: 1em; margin-left: auto; margin-right: auto;"><img border="0" height="212" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEge6Dd3pLKE9oQFlSLmzZm6m4oPWxfQhOItxyUypohP5lEXQQNCskDNQdoY8qCWarIEk1Bu_QvXSi66cxtrT_fAZQZN_6NV3f6J_Gyi4yMyVxekZRHlzqzI7yYQMyeevGMKVxYBSkltcHA/s1600/156030-Blue+Starfish-Linckia+laevigata.jpg" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><i>Linckia laevigatus. sumber gambar: http://www.naturesworld.pk/images/Invertebrates/Starfish/156030-Blue%20Starfish-Linckia%20laevigata.jpg</i></td></tr>
</tbody></table>
<br />
<table cellpadding="0" cellspacing="0" class="tr-caption-container" style="float: left; margin-right: 1em; text-align: left;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgNguKNkoEErBIKgszDMquOyq1zhhNeu-opRWJ-gQ14o3EcI3pgyCfqwL1G_pmj5GJJuk75zrFzDoSHnBHc51eu7oWtQtASyxao2kQrhBQ1sfDAPKR6WtbaXBh3JDKsRbXYB-0gtVr48cc/s1600/340px-acanthaster_planci3.jpg" imageanchor="1" style="clear: left; margin-bottom: 1em; margin-left: auto; margin-right: auto;"><img border="0" height="232" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgNguKNkoEErBIKgszDMquOyq1zhhNeu-opRWJ-gQ14o3EcI3pgyCfqwL1G_pmj5GJJuk75zrFzDoSHnBHc51eu7oWtQtASyxao2kQrhBQ1sfDAPKR6WtbaXBh3JDKsRbXYB-0gtVr48cc/s1600/340px-acanthaster_planci3.jpg" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><i>Acanthaster planci. sumber gambar: http://susanasmara.files.wordpress.com/2012/06/340px-acanthaster_planci3.jpg</i></td></tr>
</tbody></table>
<br />
<table cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg4AQGNe9HQeB5k-_I_2TKdgptbiyJSrOiYIJy6MEqFAvllYjKlksSHmy48fWq2peIpI0q4f6fAR24XnY3PCc-7ke8yZ8tHGDv1jSlbi4oofhzZZCA-PiIEB1tN1RAZzjzlUMHibE8dozM/s1600/astropecten+irregularis.jpg" imageanchor="1" style="clear: left; margin-bottom: 1em; margin-left: auto; margin-right: auto;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg4AQGNe9HQeB5k-_I_2TKdgptbiyJSrOiYIJy6MEqFAvllYjKlksSHmy48fWq2peIpI0q4f6fAR24XnY3PCc-7ke8yZ8tHGDv1jSlbi4oofhzZZCA-PiIEB1tN1RAZzjzlUMHibE8dozM/s1600/astropecten+irregularis.jpg" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><i>Astropecten irrengularis. sumner gambar: http://www.marlin.ac.uk/imgs/o_astirr.jpg</i></td></tr>
</tbody></table>
<br />
<table cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgQUbgd5aAc36ri15V4VtAvqwZMsp77XtVDRugehPquzA98zXS5iLUHKGBoPb72GiFWyETw4kyUiZoqjqkqOYa9kiwue3KRtS6BLSGE0KvheTGdutAJsvtPsCq5WZ8FH5j4AY8BCaW_HH0/s1600/crossaster+papposus=.jpg" imageanchor="1" style="clear: left; margin-bottom: 1em; margin-left: auto; margin-right: auto;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgQUbgd5aAc36ri15V4VtAvqwZMsp77XtVDRugehPquzA98zXS5iLUHKGBoPb72GiFWyETw4kyUiZoqjqkqOYa9kiwue3KRtS6BLSGE0KvheTGdutAJsvtPsCq5WZ8FH5j4AY8BCaW_HH0/s1600/crossaster+papposus=.jpg" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><i>Crossaster papposus. sumber gambar: http://www.habitas.org.uk/marinelife/echinode/bep_7063s.jpg</i></td></tr>
</tbody></table>
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<b style="mso-bidi-font-weight: normal;"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;"> <table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhYlOiaRNgh_BQGVVQjjAMdqLr9nJS6m1zAC1gagxHLqgzv27r3VcR7QojmZF_9IZoWejiBAPee9X52nhNAw8c8B5lb7QWWly5qZB9OilULg-tBJtVYKK3UnTGAhjUhqFzEQjW9j7GrsiE/s1600/Untitled-1.png" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="324" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhYlOiaRNgh_BQGVVQjjAMdqLr9nJS6m1zAC1gagxHLqgzv27r3VcR7QojmZF_9IZoWejiBAPee9X52nhNAw8c8B5lb7QWWly5qZB9OilULg-tBJtVYKK3UnTGAhjUhqFzEQjW9j7GrsiE/s1600/Untitled-1.png" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><i><b>Daur hidup</b></i></td></tr>
</tbody></table>
</span></b><br />
<b style="mso-bidi-font-weight: normal;"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Sistem Organ dalam
Tubuh Asteroidea.</span></b></div>
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<b style="mso-bidi-font-weight: normal;"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Sistem
Organ</span></b></div>
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<b style="mso-bidi-font-weight: normal;"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Keterangan</span></b></div>
</td>
</tr>
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<td style="border-top: none; border: solid windowtext 1.0pt; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 125.9pt;" width="168"><div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Sistem
pencernaan makanan</span></div>
</td>
<td style="border-bottom: solid windowtext 1.0pt; border-left: none; border-right: solid windowtext 1.0pt; border-top: none; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 336.2pt;" width="448"><div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; text-align: justify; text-justify: inter-ideograph;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Saluran
pencernaan dimulai dari mulut yang berhubungan dengan kerongkongan yang sanga
pendek dan selanjutnya bersambung dengan kantong yang berperan sebagai
lambung. Lambung terdiri dari dua bagian, bagian muka (kardiak) berukuran
lebih besar daripada bagian belakang (pilorus). Dalam proses pencernaan,
lambung mengeluarkan sekresi mukosa. Dari pilorus, muncul saluran ke
masing-masing lengan. Lengan bercabang-cabang menjadi dua yang disebut <b style="mso-bidi-font-weight: normal;"><i style="mso-bidi-font-style: normal;">Caeca
Hepatis</i></b> (warnanya hijau) atau disebut juga saku pilorus. Disini
dilakukan sekresi enzim untuk mencerna tubuh lunak molusca mangsanya. Di atas
lambung tedapat usus berupa saluran pendek yang terbuka pada daerah anus.</span></div>
<div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; text-align: justify; text-justify: inter-ideograph;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Makanan
bintang laut berupa sampah, ikan kecil, siput dan kerang. Bahan-bahan makanan
dicerna dengan bantuan mukosa dan enzim, sedangkan bahan yang tidak di cerna
di keluarkan melalui mulut. Cairan dalam selom mengandung zat makanan yang
diedarkan oleh silia ke seluruh tubuh.</span></div>
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</tr>
<tr style="mso-yfti-irow: 2;">
<td style="border-top: none; border: solid windowtext 1.0pt; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 125.9pt;" width="168"><div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Sistem
pernapasan</span></div>
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<td style="border-bottom: solid windowtext 1.0pt; border-left: none; border-right: solid windowtext 1.0pt; border-top: none; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 336.2pt;" width="448"><div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; text-align: justify; text-justify: inter-ideograph;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Respirasi
terjadi di dalam <b style="mso-bidi-font-weight: normal;"><i style="mso-bidi-font-style: normal;">Branchia Dermalis</i></b>, yaitu suatu kantong berbulu halus yang di
lengkapi dengan silia. Organ ini terletak pada semua lengan (papula) bagian
kulit.silia sebelah luar bertugas mengalirkan air beroksigen ke permukaan
brabchia secara tetap, sedangkan silia sebelah dalam mendorong cairan tubuh
kedalam branchia. Pada saat cairan berada dalam branchia, terjadilah
pertukaran oksigen dengan karbon dioksida seperti halnya pada paru-paru
vertebrata.</span></div>
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</tr>
<tr style="mso-yfti-irow: 3;">
<td style="border-top: none; border: solid windowtext 1.0pt; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 125.9pt;" width="168"><div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Sistem
ekskresi</span></div>
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<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Ekskresi
di lakukan oleh sel-sel amebosit yang terdapat dalam cairan selom. Zat sisa
ini di bawa keluar tubuh melalui dinding derma brankhialis. Pada usus
terdapat dua percabangan yang berwarna cokelat yang mensekresikan cairan
berwarna kecokelatan.</span></div>
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<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Sistem
saraf</span></div>
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<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Sistem
saraf berupa batang saraf radial yang terdapat pada setiap lengan dengan letak
memanjang di atas ambulakral yang akhirnya bertemu dengan cincin saraf oralis
yang melingkari mulut. Pada setiap batang saraf radial terdapat percabangan
saraf ke daerah aboral, aboral peritonium, indra perasa di kaki, indra
peraba, dan titik mata yang peka terhadap sinar. Diantara sel-sel epidermis
juga terdapat jaringan saraf, sedangkan di daerah branchia dermalis terdapat
alat sensoris.</span></div>
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<td style="border-top: none; border: solid windowtext 1.0pt; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 125.9pt;" width="168"><div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Sistem
reproduksi</span></div>
</td>
<td style="border-bottom: solid windowtext 1.0pt; border-left: none; border-right: solid windowtext 1.0pt; border-top: none; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 336.2pt;" width="448"><div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; text-align: justify; text-justify: inter-ideograph;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Bintang
laut bersifar diesis. Alat reproduksinya bercabang-cabang dan terletak di
setiap lengan. Alat reproduksi betina menghasilkan banyak telur (sekitar 2,5
juta setiap 2 jam), sedangkan yang jantan menghasilkan spermatozoa yang lebih
banyak daripada ovum. Fefrtilisasi terjadi di air, selanjutnya akan di
hasilkan larva <b style="mso-bidi-font-weight: normal;"><i style="mso-bidi-font-style: normal;">Bipinaria</i></b>.</span></div>
</td>
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<br />
<br />
<iframe allowfullscreen="" frameborder="0" height="315" src="//www.youtube.com/embed/F447PCQYJkY" width="420"></iframe>Anonymoushttp://www.blogger.com/profile/04734618468163115287noreply@blogger.com2tag:blogger.com,1999:blog-3155849710910275961.post-50192844381955865892013-04-12T18:30:00.002-07:002013-08-16T11:13:08.554-07:00Ophiuroidea<div style="line-height: 2em; text-align: justify;">
Ophiuroidea hidup di laut yang dangkal hingga laut yang dalam. Hewan ini aktif pada malam hari. Makanan ophiuroidea berupa udang-udangan, mollusca, sampah dan sisa organisme lain. Tubuh ophiuroidea berbentuk bola cakram kecil dengan lima lengan bulat panjang. Di bagian lateral berduri, sedangkan di bagian dorsal dan ventral tidak berduri.
Lengan terdiri atas ruas-ruas yang sama, masing-masing terdapat osikula silindris. Lengannya panjang dan fleksibel karena adanya empat otot diantara osikula silindris. Pembuluh darah, sistem saraf, cabang-cabang sistem vaskular air, dan kaki ambulakral kecil terdapat pada lengan tersebut. Hewan ini memiliki rongga tubuh yang kecil dan di permukaan mulutnya terdapat madreporit. Kaki ambulakral disebut tentakel yang di lengkapi alat hisap (Ampula) dan alat-alat sensoris yang berfungsi untuk memasukkan makanan ke mulut dan sebagai alat bantu. Contoh hewan ini adalah bintang ular (<i>Ophiotrix sp.</i>) dan <i>Ophioderma brevispinum.</i><br />
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgeaKDYijsJSqAtkiazgzizFIxnukLUFF7qgxh1berck-5ENxbjbocKfGbMoT-FNQYrv50tCgg20tVhegXLYzetUVEY8Xdoc2T85xUJn3ta2v54m1YVHrzdPez8hOwyhApYeWV5NAHQlBU/s1600/jaha000199.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgeaKDYijsJSqAtkiazgzizFIxnukLUFF7qgxh1berck-5ENxbjbocKfGbMoT-FNQYrv50tCgg20tVhegXLYzetUVEY8Xdoc2T85xUJn3ta2v54m1YVHrzdPez8hOwyhApYeWV5NAHQlBU/s1600/jaha000199.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><i>Ophioderma brevispinum. sumber gambar: http://fran.cornu.free.fr/images/jaha/jaha000199.jpg</i></td></tr>
</tbody></table>
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<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhb01cDxkFbS6JQ0rKsYW2Zl3YAKZcOOK5GntyQZY98t_D2vfiLWx48kN49KaXOxRevZXUh_bTmiG_RZu1_llzpBd9V9byfxOLlnOVZwfUviM-XVuh5kXDE4pfBUxSHOSPC6bVgyiAI7xc/s1600/050621skdg7883m3.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhb01cDxkFbS6JQ0rKsYW2Zl3YAKZcOOK5GntyQZY98t_D2vfiLWx48kN49KaXOxRevZXUh_bTmiG_RZu1_llzpBd9V9byfxOLlnOVZwfUviM-XVuh5kXDE4pfBUxSHOSPC6bVgyiAI7xc/s1600/050621skdg7883m3.jpg" width="400" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><i>Ophiotrix sp. sumber gambar: http://www.wildsingapore.com/wildfacts/echinodermata/ophiuroidea/upsidedown/050621skdg7883m3.jpg</i></td></tr>
</tbody></table>
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<br /></div>
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<b style="mso-bidi-font-weight: normal;"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Sistem Organ dalam
Tubuh Ophiuroidea.</span></b></div>
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Organ</span></b></div>
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<b style="mso-bidi-font-weight: normal;"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Keterangan</span></b></div>
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<td style="border-top: none; border: solid windowtext 1.0pt; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 125.9pt;" width="168"><div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Sistem
pencernaan makanan</span></div>
</td>
<td style="border-bottom: solid windowtext 1.0pt; border-left: none; border-right: solid windowtext 1.0pt; border-top: none; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 336.2pt;" width="448"><div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; text-align: justify; text-justify: inter-ideograph;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Alat-alat
pencernaan terdapat dalam bola cakram, di mulai dari mulut yang terletak di
pusat tubuh kemudian lambung berbentuk kantong. Hewan ini tidak memiliki
anus. Di sekeliling mulut terdapat rahang yang berupa 5 kelompok lempeng
kapur.</span></div>
<div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; text-align: justify; text-justify: inter-ideograph;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Makanan
di pegang dengan satu atau lebih lengannya, kemudian di hentakkkan dan dengan
bantuan tentakel dimasukkan ke mulut. Sesudah dicerna, bahan-bahan yang tidak
tercerna di buang keluar melalui mulut.</span></div>
</td>
</tr>
<tr style="mso-yfti-irow: 2;">
<td style="border-top: none; border: solid windowtext 1.0pt; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 125.9pt;" width="168"><div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Sistem
pernapasan</span></div>
</td>
<td style="border-bottom: solid windowtext 1.0pt; border-left: none; border-right: solid windowtext 1.0pt; border-top: none; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 336.2pt;" width="448"><div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; text-align: justify; text-justify: inter-ideograph;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Pernapasan
dilakukanoleh 5 pasang kantong kecil yang bercelah disekitar mulut, alat ini
berhubungan dengan saluran alat reproduksi (gonad).</span></div>
</td>
</tr>
<tr style="mso-yfti-irow: 3; mso-yfti-lastrow: yes;">
<td style="border-top: none; border: solid windowtext 1.0pt; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 125.9pt;" width="168"><div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Sistem
reproduksi</span></div>
</td>
<td style="border-bottom: solid windowtext 1.0pt; border-left: none; border-right: solid windowtext 1.0pt; border-top: none; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 336.2pt;" width="448"><div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; text-align: justify; text-justify: inter-ideograph;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Jenis
kelamin hewan ini terpisah. Hewan ini melepaskan sel kelamin ke air dan hasil
pembuahannya akan tumbuh menjadi larva mikroskopis yang lengannya bersilia,
disebut <b style="mso-bidi-font-weight: normal;"><i style="mso-bidi-font-style: normal;">Pluteus</i></b>. Pluteus kemudian mengalami metamorfosis menjadi
bentuk seperti bintang laut dan akhirnya menjadi bintang ular.</span></div>
</td>
</tr>
</tbody></table>
</div>
</div>
<br />
<iframe allowfullscreen="" frameborder="0" height="315" src="//www.youtube.com/embed/hWpQjI-Ates" width="420"></iframe>Anonymoushttp://www.blogger.com/profile/04734618468163115287noreply@blogger.com3tag:blogger.com,1999:blog-3155849710910275961.post-66504449270856598862013-04-11T19:33:00.003-07:002013-08-16T11:21:00.050-07:00Crinoidea<div style="line-height: 2em; text-align: justify;">
<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjGR0qbJNOMXG_-5CG8HKmkix2oG92KZ888WxYD2VEhBcXvgipt04ogxiyEH-22m2IRFVT8ILhRG5nIar2TzQdeSZFqInFcG4C5jEJoicpzSvPlMLBbq27Tt8uPAAosnCmx3aPFH5qV1Z4/s1600/metacrinus.jpg" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjGR0qbJNOMXG_-5CG8HKmkix2oG92KZ888WxYD2VEhBcXvgipt04ogxiyEH-22m2IRFVT8ILhRG5nIar2TzQdeSZFqInFcG4C5jEJoicpzSvPlMLBbq27Tt8uPAAosnCmx3aPFH5qV1Z4/s1600/metacrinus.jpg" width="211" /></a></div>
Crinoidea biasanya hidup di laut yang dalam (±3.648 m). Hidupnya dengan cara menempel di dasar laut, di barisan koral, atau membentuk taman laut. Jenis yang sekarang masih ada misalnya Antedon sp. warna hewan ini sangat bervariasi, misalnya putih seperti berlian, kuning, hijau dan cokelat. Biasanya hewan ini hidup melekat pada batu karang dengan tangkai atau menggunakan alat pencengkram (siri) apabila tidak mempunyai tangkai.<br />
Bentuk tubuhnya bisa menyerupai bunga lili, bunga bakung atau bulu burung. Tubuhnya tersusun dari lempeng kapur dan berbentuk cangkir (kaliks). Dari kaliks ini tersembul lima lengan lentur, misalnya pada lili air (Metacrinus) dan yang berenang bebas (Antedon sp.). hewan ini memiliki bagian tentakel pendek dan masing-masing memiliki pinula sehingga seperti bulu burung (daun bersirip).
Beberapa jenis lili laut memiliki tangkai sebagai alat perekat sehingga bentuknya seperti sebuah pohon yang terdiri dari batang dan akar. Sebagian lili laut lain tidak memilikinya, misalnya Bulu bintang (Antedon tanella) bulu bintang tidak bertangkai, tetapi memiliki sirus untuk memgang suatu objek.
Mulut dan anus hewan ini terletak bersebelahan; mulut di daerah oral, sedangkan anus di daerah aboral. Anus sering berupa tonjolan seperti kerucut. Lekukan ambulakral lili laut di oral di tandai garis bersilia berisi tentakel seperti kaki buluh dan tidak memiliki madreporit. Contoh spesies yang bertangkai, <i>Metacrinus interruptus<i> </i></i>dan yang tidak bertangkai <i><i><i>Antedon tanella<i>.
</i></i></i></i><br />
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiNR6bNE01troQK6Jml1xi_1h9K16-BHj38mYdd4tz0PwDkm1r6Q_hrB7AiikJV41gEh9Ie709azmqEpXFP95lBDqJ8gaQSsb3VcM7butr1KsxR7SgbdylI9bLSw0v26xGsaHBvrTKI7LY/s1600/metacrinus.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiNR6bNE01troQK6Jml1xi_1h9K16-BHj38mYdd4tz0PwDkm1r6Q_hrB7AiikJV41gEh9Ie709azmqEpXFP95lBDqJ8gaQSsb3VcM7butr1KsxR7SgbdylI9bLSw0v26xGsaHBvrTKI7LY/s320/metacrinus.jpg" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><i>Metacrinus. sumber gambar: http://www.nova.edu/ocean/messing/crinoids/1%20Web%20page%20intro_files/image008.jpg</i><b><br /></b></td></tr>
</tbody></table>
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi2pj8-hemZL_-CXVmbZby1N9Vzj8-et_NzCHvUIJW2z3UnN4e-mrfrVbn53umzPPI5ROerzoU9pqHA-PfDS3pqQbUq7tLD-i3Ux2ZS2jtMQCdhCDNanemFpvYBY0aGpYc7q-seUBdzYrY/s1600/dsc_2511s.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi2pj8-hemZL_-CXVmbZby1N9Vzj8-et_NzCHvUIJW2z3UnN4e-mrfrVbn53umzPPI5ROerzoU9pqHA-PfDS3pqQbUq7tLD-i3Ux2ZS2jtMQCdhCDNanemFpvYBY0aGpYc7q-seUBdzYrY/s1600/dsc_2511s.jpg" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><i>Antedon Sp. sumber gambar: http://www.habitas.org.uk/marinelife/echinode/dsc_2511s.jpg</i></td></tr>
</tbody></table>
<div class="separator" style="clear: both; text-align: center;">
</div>
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<i><i><i><b style="mso-bidi-font-weight: normal;"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Sistem
Organ dalam Tubuh Crinoidea.</span></b></i></i></i></div>
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Organ</span></b></div>
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saraf </span></div>
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<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Sistem
saraf terletak di daerah aboral. Pusat saraf berbentuk cincin yang bercabang
ke lengan.</span></div>
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reproduksi</span></div>
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dapat terjadi secara seksual dan aseksual. Reproduksi aseksual dengan
regenerasi bagian tubuh. Reproduksi seksual dengan fertilisasi eksternal.
Crinoidea bersifat diesis. Rongga tubuhnya sempit dan memiliki gonad yang
terdapat dalam pinula. Beberapa crinoidea melepas telur ke air, tetapi ada
juga yang menahannya hingga menetas di pinula.</span></div>
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<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Hasil
pembuahan tumbuh menjadi larva muda yang belum mempunyai mulut. Setelah
beberapa hari larva akan lepas dari pinula dan menempel di dasar laut lalu
mengalami pertumbuhan menjadi kaliks dengan lengan. Jika kaliks hilang akan
segera di perbaharui. Karena daya regenerasi yang tinggi.</span></div>
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<i><i><i>
</i></i></i></div>
<br />
<div style="text-align: center;">
Bagian-bagian tubuh crinoidea.</div>
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjnhvAhEREiHo6QL9LjZg8jJ8fZ9CtJB5g_OtsoUb5-3UBuShP-KGdaTC_ihuTIZIIe5ttIXmxraOGnMRD_gmNe7FrchqCkKl4xxMPV30jrp0oKndCnUHghqdEuWQ_B1ZXWHGaL9PgTX2A/s1600/Crinoidea+_+lilia+laut.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="419" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjnhvAhEREiHo6QL9LjZg8jJ8fZ9CtJB5g_OtsoUb5-3UBuShP-KGdaTC_ihuTIZIIe5ttIXmxraOGnMRD_gmNe7FrchqCkKl4xxMPV30jrp0oKndCnUHghqdEuWQ_B1ZXWHGaL9PgTX2A/s1600/Crinoidea+_+lilia+laut.jpg" width="640" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><i>https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgkMFECLQXVQWKOV7-HYOUYtlM_VFVtAnoyoFHS-Tmimp7DyYlcjcb9c4cmWf6Rb_Xrsg4JXRK3uEQ_KA60FUkkL8ssRdWOxu2njFxPRg0ClVzvwbcfquFBstbkeFbim59y9eG5ZkophlMM/s1600/Crinoidea+_+lilia+laut.jpg</i></td></tr>
</tbody></table>
<br />
<br />
<iframe allowfullscreen="" frameborder="0" height="315" src="//www.youtube.com/embed/aJgbd9xSLhU" width="420"></iframe>Anonymoushttp://www.blogger.com/profile/04734618468163115287noreply@blogger.com8tag:blogger.com,1999:blog-3155849710910275961.post-10634163007856689452013-04-11T19:08:00.004-07:002013-08-16T11:28:16.296-07:00Holothuroidea (Tripang/timun laut)<div style="line-height: 2em; text-align: justify;">
<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh914Y3RF4ZH38cxtDVkwX-jOp8dxZDamDiQ3Nfkcv1DluHYVHLpLFOzbfnMRWRY-mrn-lySA-YpqJ70KQaJ_rtgJC3WjIgP-8TS294vmUHChnAn7BGaECrKL_P4wYi-xcz-x2wnI5mjTc/s1600/17.jpg" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh914Y3RF4ZH38cxtDVkwX-jOp8dxZDamDiQ3Nfkcv1DluHYVHLpLFOzbfnMRWRY-mrn-lySA-YpqJ70KQaJ_rtgJC3WjIgP-8TS294vmUHChnAn7BGaECrKL_P4wYi-xcz-x2wnI5mjTc/s1600/17.jpg" width="320" /></a></div>
Tubuh tripang tidak dapat ditegakkan (berdiri) karena banyak mengandung lemak sedangkan kandungan zat kapurnya sedikit. Holothuroidea hidup di laut, yaitu di dasar laut dengan cara bersembunyi di lumpur/pasir. Jika di ganggu, hewan ini akan mengerut karena gerakan kontraksi. Holothuroidea tidak berduri dan memiliki banyak endoskeleton yang tereduksi. Tubuh bulat memanjang tertutupi oleh kulit yang berkutikula dan tidak bersilia.<br />
Dibawah kulit terdapat dermis yang mengandung osikula, selapis otot melingkar, dan lima otot ganda memanjang. Dengan adanya lengan brotot ini, timun laut dapat bergerak memanjang memendek seperti cacing. Di bagian anterior mulut terdapat 10-30 tentakel yang identik dengan kaki buluh, tetapi dapat di julurkan dan di tarik kembali beberapa jenis hewan ini memiliki kaki ambulakral yang dapat berkontraksi dan berfungsi sebagai alat respirasi. Di daerah ventral terdapat tiga daerah kaki yang dilengkapi dengan alat hisap yang berfungsi untuk alat bergerak. Selom tidak terbagi-bagi dan berisi cairan yang mengandung sel-sel amebosit. Contoh spesiesnya adalah <i>Cucumaria frondosa, Holothuria, Thyone briareus<i>.</i></i><br />
<i><i>
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEivtZmRoTO3OMK_gJuz6_bKNcTaw1x2ttvDbrY3JOOgKVxD2YRa3IuYMv3Az0lEERYK9QrRttVTtPdo4ZpzDRSsgo_PuBkZAc6TRW-Qhceh60f11bmPD-ewWWHeT2ueQ72N7aayh9mpaM0/s1600/sea-cucumbers-cucumaria-frondosa.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEivtZmRoTO3OMK_gJuz6_bKNcTaw1x2ttvDbrY3JOOgKVxD2YRa3IuYMv3Az0lEERYK9QrRttVTtPdo4ZpzDRSsgo_PuBkZAc6TRW-Qhceh60f11bmPD-ewWWHeT2ueQ72N7aayh9mpaM0/s320/sea-cucumbers-cucumaria-frondosa.jpg" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><i>Cucumaria frondosa. sumber gambar: http://imgusr.tradekey.com/p-B3902642-20100518215356/sea-cucumbers-cucumaria-frondosa.jpg</i></td></tr>
</tbody></table>
</i></i><br />
<div>
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh914Y3RF4ZH38cxtDVkwX-jOp8dxZDamDiQ3Nfkcv1DluHYVHLpLFOzbfnMRWRY-mrn-lySA-YpqJ70KQaJ_rtgJC3WjIgP-8TS294vmUHChnAn7BGaECrKL_P4wYi-xcz-x2wnI5mjTc/s1600/17.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh914Y3RF4ZH38cxtDVkwX-jOp8dxZDamDiQ3Nfkcv1DluHYVHLpLFOzbfnMRWRY-mrn-lySA-YpqJ70KQaJ_rtgJC3WjIgP-8TS294vmUHChnAn7BGaECrKL_P4wYi-xcz-x2wnI5mjTc/s1600/17.jpg" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><i>Holothuria scabra. sumber gambar: https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjpgz_7gwiY7Wph7l5drvdkTHs2IDD6QSYj8wl58jr_9dShO01DOcHyT5ExRjGaYeM0xRnJ6-kMZmIK3J335sUEkRtg-GKUGKNg1Zbx8c41S2yBQyfUgqyjG1FVN3mngPcIRDshXnddNIKQ/s1600/17.jp</i></td></tr>
</tbody></table>
<i><i></i></i>
<i><i>Sistem organ dalam Holothuroidea.</i></i>
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<![endif]--><i><i>
</i></i><br />
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<tr style="mso-yfti-firstrow: yes; mso-yfti-irow: 0;">
<td style="border: solid windowtext 1.0pt; mso-border-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 125.9pt;" width="168"><div align="center" class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; text-align: center;">
<b style="mso-bidi-font-weight: normal;"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Sistem
Organ</span></b></div>
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<td style="border-left: none; border: solid windowtext 1.0pt; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 336.2pt;" width="448"><div align="center" class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; text-align: center;">
<b style="mso-bidi-font-weight: normal;"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Keterangan</span></b></div>
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</tr>
<tr style="mso-yfti-irow: 1;">
<td style="border-top: none; border: solid windowtext 1.0pt; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 125.9pt;" width="168"><div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Sistem
pencernaan makanan</span></div>
</td>
<td style="border-bottom: solid windowtext 1.0pt; border-left: none; border-right: solid windowtext 1.0pt; border-top: none; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 336.2pt;" width="448"><div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; text-align: justify; text-justify: inter-ideograph;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Saluran
pencernaan bulat panjang dengan posisi merentang di atas rongga tubuh dalam
selom. Kerongkongan pendek merupakan sambungan dari mulut ke lambung. Dari
lambung, saluran pencernaan selanjutnya adalah usus yang panjang dan
berhubungan dengan kloaka. Saluran pencernaan berakhir dengan sebuah anus di
daerah posterior.</span></div>
</td>
</tr>
<tr style="mso-yfti-irow: 2;">
<td style="border-top: none; border: solid windowtext 1.0pt; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 125.9pt;" width="168"><div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Sistem
pernapasan</span></div>
</td>
<td style="border-bottom: solid windowtext 1.0pt; border-left: none; border-right: solid windowtext 1.0pt; border-top: none; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 336.2pt;" width="448"><div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; text-align: justify; text-justify: inter-ideograph;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Alat
pernapasan berupa saluran bercabang-cabang seperti pohon yang sebenarnya
merupakan perluasan kloaka ke dalam selom. Saluran ini berfungsi juga sebagai
alat ekskresi.</span></div>
</td>
</tr>
<tr style="mso-yfti-irow: 3; mso-yfti-lastrow: yes;">
<td style="border-top: none; border: solid windowtext 1.0pt; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 125.9pt;" width="168"><div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Sistem
reproduksi</span></div>
</td>
<td style="border-bottom: solid windowtext 1.0pt; border-left: none; border-right: solid windowtext 1.0pt; border-top: none; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 336.2pt;" width="448"><div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; text-align: justify; text-justify: inter-ideograph;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Pada
umumnya alat reproduksi terpisah, tetapi ada beberapa jenis yang hermafrodit.
Gonad bentuknya seperti sikat dengan saluran penghubung yang terbuka di
daerah tentakel.</span></div>
<div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; text-align: justify; text-justify: inter-ideograph;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Sel
telur maupun sperma di keluarkan ke air laut, dan selanjutnya terjadi
fertilisasi di luar. Zigot tumbuh menjadi larva <b style="mso-bidi-font-weight: normal;"><i style="mso-bidi-font-style: normal;">Aurikularia</i></b>. Beberapa
jenis hewan ini menyimpan telur yang telah dibuahi di dalam tubuhnya.</span></div>
</td>
</tr>
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<i><i><br /></i></i>
<i><i><br /></i></i></div>
<i><i>
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<iframe allowfullscreen="" frameborder="0" height="315" src="//www.youtube.com/embed/vsLBOkYLLeI" width="420"></iframe>Anonymoushttp://www.blogger.com/profile/04734618468163115287noreply@blogger.com5tag:blogger.com,1999:blog-3155849710910275961.post-53191147930372707282013-04-11T18:38:00.003-07:002013-08-16T11:36:24.822-07:00Echinoidea (Landak laut/bulu babi)<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg8kHwJN5wR82r8X7GaLoDsahe74RvkTqRIBxIFbGyZVXroFfbGJThfzaTiAD9TZzge_0A7EQ8QBJNfsTX-12aR2EHD5CzqcFIgDOXi8QWyq3x5R8_dvopA9yPsITCSHVFUyWuVJ4tRfUI/s1600/260px-Seaurchin.jpg" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img alt="" border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg8kHwJN5wR82r8X7GaLoDsahe74RvkTqRIBxIFbGyZVXroFfbGJThfzaTiAD9TZzge_0A7EQ8QBJNfsTX-12aR2EHD5CzqcFIgDOXi8QWyq3x5R8_dvopA9yPsITCSHVFUyWuVJ4tRfUI/s320/260px-Seaurchin.jpg" title="" /></a><br />
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Landak laut biasanya hidup di daerah pantai, di atas batu karang, di dasar laut, dalam lumpur, atau di sumur-sumuran daerah pantai, bahkan ada juga yang hidup di daerah muara sungai dengan membenamkan diri di tanah liat atau di bawah karang. Hewan-hewan yang termasuk kelas ini berbentuk bundar tak berlengan, tetapi memiliki duri yang dapat di gerakkan. Beberapa contoh echinoidea antara lain, Diadema antillarum, dan Strongylosentrosus (Berbentuk bola), Spatangus (berbentuk oval), Echinarachnius (berbentuk seperti uang logam) yang sering disebut dolar pasir.<br />
Mulut hewan ini terdapat di bagian bawah (oral) yang dilengkapi dengan lima gigi tajam dari zat kapur. Gigi tersebut digunakan untuk menggali lubang pada lapisan pasir atau batuan sebagai tempat tinggalnya atau sarang. Hewan ini biasa memakan tumbuhan laut dan sisa-sisa hewan.<br />
Tubuh bundar karena cangkoknya tersusun dari jajaran lempeng kapur yang tersambung membentuk bola. Pada cangkang terdapat tonjolan (Tuberkulum) yang merupakan tempat persendian duri-duri. Duri-duri dibentuk dari kristal kalsium karbonat yang berujung melebar dan berhubungan dengan tuberkulum. Pangkal duri terikat otot sehingga duri dapat di gerakkan. Diantara duri-duri terdapat pediselaria yang berfungsi untuk menangkap makanan dan membersihkan tubuh. Letak madreporit hewan ini di daerah aboral, sedangkan saluran cincinnya melingkari kerongkongan, dan saluran radial berada di dalam cangkang yang berhubungan dengan kaki ambulakral. Ada beberapa jenis echinoidea yang mengerami telur dalam bilik hingga menetas menjadi larva. Contoh spesiesnya adalah <span style="color: lime;"><i>Arbacia punctulata</i></span> (landak laut), <span style="color: lime;"><i>Diadema saxatile</i></span> (bulu babi), <span style="color: lime;"><i>Echinarachnius parma</i></span> (dolar pasir).
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEidKwsm4kAsK7UUDEtNp2SF4DThUoVbew5JW2akYzzJ-rcMsoznpcVkQqReLNbObamPR24y8lpgt44h3XCplKzG9PzXvlPAtKbLxDNEmxu3NRRDAs35qNcJTQDoDIUXk5RX1HwuWdCuo5k/s1600/arbacia+punctulata.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="199" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEidKwsm4kAsK7UUDEtNp2SF4DThUoVbew5JW2akYzzJ-rcMsoznpcVkQqReLNbObamPR24y8lpgt44h3XCplKzG9PzXvlPAtKbLxDNEmxu3NRRDAs35qNcJTQDoDIUXk5RX1HwuWdCuo5k/s320/arbacia+punctulata.jpg" width="200" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><i>Arbacia punctulata. sumber gambar: http://www.jaxshells.org/0628aa.jpg</i></td><td class="tr-caption" style="text-align: center;"><br /></td></tr>
</tbody></table>
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEggMQyfmFSF-2Vv7oaYxe0SUGcF3LMcB3x57MDYrQLOnP7h2KVsnkwEEoApeQqS4ghTvxU2xrvVCBndbEEhQ85_g-i7zklmgIQBQfX26BhA-C2Jbvs03M_R-GYCpALkqpbr687MScYGs3E/s1600/diadema+antillarum.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEggMQyfmFSF-2Vv7oaYxe0SUGcF3LMcB3x57MDYrQLOnP7h2KVsnkwEEoApeQqS4ghTvxU2xrvVCBndbEEhQ85_g-i7zklmgIQBQfX26BhA-C2Jbvs03M_R-GYCpALkqpbr687MScYGs3E/s320/diadema+antillarum.jpg" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><i>Diadema antillarum. sumber gambar: http://www.natuurlijkmooi.net/images/diaantc.jpg</i></td></tr>
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<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgaiqRZWMOZ-MynAF5pLfQzvMwl2IVfe_olQWJsSFE3yJpim2mZ7X0ZbmnJZMf2YSd1y14DQb4Zp1lx-5BdB09mdA1_JD7EtPYwjA-ceb5nT-mEK61jSqGgQ_z9zSkM22FZLgKUAGeDNyc/s1600/echinarachnius+parma.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" height="213" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgaiqRZWMOZ-MynAF5pLfQzvMwl2IVfe_olQWJsSFE3yJpim2mZ7X0ZbmnJZMf2YSd1y14DQb4Zp1lx-5BdB09mdA1_JD7EtPYwjA-ceb5nT-mEK61jSqGgQ_z9zSkM22FZLgKUAGeDNyc/s320/echinarachnius+parma.jpg" width="320" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;"><i>Echinarachnius parma. sumber gambar: http://images.marinespecies.org/resized/40926_echinarachnius-parma-on-sand.jpg</i></td></tr>
</tbody></table>
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<b>Sistem organ dalam tubuh echinoidea.</b><br />
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<br />
<table border="1" cellpadding="0" cellspacing="0" class="MsoTableGrid" style="border-collapse: collapse; border: none; mso-border-alt: solid windowtext .5pt; mso-padding-alt: 0cm 5.4pt 0cm 5.4pt; mso-yfti-tbllook: 1184;">
<tbody>
<tr style="mso-yfti-firstrow: yes; mso-yfti-irow: 0;">
<td style="border: solid windowtext 1.0pt; mso-border-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 125.9pt;" width="168"><div align="center" class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; text-align: center;">
<b style="mso-bidi-font-weight: normal;"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Sistem
Organ</span></b></div>
</td>
<td style="border-left: none; border: solid windowtext 1.0pt; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 336.2pt;" width="448"><div align="center" class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; text-align: center;">
<b style="mso-bidi-font-weight: normal;"><span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Keterangan</span></b></div>
</td>
</tr>
<tr style="mso-yfti-irow: 1;">
<td style="border-top: none; border: solid windowtext 1.0pt; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 125.9pt;" width="168"><div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Sistem
pencernaan makanan</span></div>
</td>
<td style="border-bottom: solid windowtext 1.0pt; border-left: none; border-right: solid windowtext 1.0pt; border-top: none; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 336.2pt;" width="448"><div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; text-align: justify; text-justify: inter-ideograph;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Sistem
pencernaan berupa saluran panjang dan melingkar dalam cangkang. Saluran
pencernaan dimulai dari mulut, terletak di daerah oral, kemudian kerongkongan
yang memiliki saluran sifon dan bersilia.</span></div>
<div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; text-align: justify; text-justify: inter-ideograph;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Saluran
sifon menghubungkan kerongkongan dengan usus. Saluran pencernaan yang
dikelilingi oleh lima rangka samping yang ada dalam cangkang (terkenal
sebagai “lentera aristoteles”) adalah lambung yang di perluas oleh
kantong-kantong dan berakhir di rektum. Anus terletak di daerah permukaan
aboral, yaitu di pusat tubuh diantara lempeng kapur yang mengandung dua,
empat, sampai lima lubang genital. Beberapa echinoidea memiliki mulut dan
anus di bagian pinggir tubuhnya, tetapi ada pula yang mulutnya terletak di
tengah.</span></div>
</td>
</tr>
<tr style="mso-yfti-irow: 2;">
<td style="border-top: none; border: solid windowtext 1.0pt; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 125.9pt;" width="168"><div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Sistem
pernapasan</span></div>
</td>
<td style="border-bottom: solid windowtext 1.0pt; border-left: none; border-right: solid windowtext 1.0pt; border-top: none; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 336.2pt;" width="448"><div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; text-align: justify; text-justify: inter-ideograph;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Pernapasan
dilakukan oleh 10 insang yang menjorok ke membran peritonium.</span></div>
</td>
</tr>
<tr style="mso-yfti-irow: 3;">
<td style="border-top: none; border: solid windowtext 1.0pt; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 125.9pt;" width="168"><div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Sistem
saraf</span></div>
</td>
<td style="border-bottom: solid windowtext 1.0pt; border-left: none; border-right: solid windowtext 1.0pt; border-top: none; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 336.2pt;" width="448"><div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; text-align: justify; text-justify: inter-ideograph;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Sistem
saraf berupa cincin yang melingkari mulut yang selanjutnya bercabang ke saraf
radial.</span></div>
</td>
</tr>
<tr style="mso-yfti-irow: 4; mso-yfti-lastrow: yes;">
<td style="border-top: none; border: solid windowtext 1.0pt; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 125.9pt;" width="168"><div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Sistem
reproduksi</span></div>
</td>
<td style="border-bottom: solid windowtext 1.0pt; border-left: none; border-right: solid windowtext 1.0pt; border-top: none; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt; padding: 0cm 5.4pt 0cm 5.4pt; width: 336.2pt;" width="448"><div class="MsoNormal" style="line-height: 150%; margin-bottom: .0001pt; margin-bottom: 0cm; text-align: justify; text-justify: inter-ideograph;">
<span style="font-family: "Times New Roman","serif"; font-size: 12.0pt; line-height: 150%;">Hewan
ini memiliki empat sampai lima gonad yang terletak di daerah permukaan
aboral. Dari gonad terdapat saluran ke lubang genital. Sesudah perjadi
fertilisasi di air, maka hasil fertilisasi akan tumbuh menjadi larva.</span></div>
</td>
</tr>
</tbody></table>
<br />
<div style="text-align: center;">
Gambar sistem organ dalam Echinoidea
</div>
<table align="center" cellpadding="0" cellspacing="0" class="tr-caption-container" style="margin-left: auto; margin-right: auto; text-align: center;"><tbody>
<tr><td style="text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjrGFG9l8YmcKf9orz3CyfOJWobIerbjxI6NW7uZkdd6-wf7Mtxm3mt5zYorMN4O6ks_L2R6zMvsnUUxT8HSKqTTa9LNJFrTFJ8bBaeRnXfdu_DFwhrUc2419AB9Pwu6KhaHSoZ25lCaOA/s1600/httpanimaldiversity.ummz.umich.educollectionscontributorsGrzimek_invertsEchinoideav01_id146_con_echanatmedium.jpg.jpg" imageanchor="1" style="margin-left: auto; margin-right: auto;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjrGFG9l8YmcKf9orz3CyfOJWobIerbjxI6NW7uZkdd6-wf7Mtxm3mt5zYorMN4O6ks_L2R6zMvsnUUxT8HSKqTTa9LNJFrTFJ8bBaeRnXfdu_DFwhrUc2419AB9Pwu6KhaHSoZ25lCaOA/s320/httpanimaldiversity.ummz.umich.educollectionscontributorsGrzimek_invertsEchinoideav01_id146_con_echanatmedium.jpg.jpg" /></a></td></tr>
<tr><td class="tr-caption" style="text-align: center;">sumber gambar: <i>http://animaldiversity.ummz.umich.edu/collections/contributors/Grzimek_inverts/Echinoidea/v01_id146_con_echanat/medium.jpg</i><br />
<br />
<br />
<br /></td></tr>
</tbody></table>
<iframe allowfullscreen="" frameborder="0" height="315" src="//www.youtube.com/embed/MZjC510cSAA" width="420"></iframe>Anonymoushttp://www.blogger.com/profile/04734618468163115287noreply@blogger.com2tag:blogger.com,1999:blog-3155849710910275961.post-37530718228368280832013-03-08T07:44:00.003-08:002013-03-08T07:50:19.627-08:00Link ExchangeSilahkan bagi yang mau bertukar link, langsung saja copy link berikut dan simpan di blog sobat:<br />
<br />
Link ---- <span style="color: blue;">http://blogpembelajaranbiologi.blogspot.com/</span><br />
Anchor text ---- <span style="color: blue;">Blog Biologi</span><br />
<br />
Jika sudah, silahkan berkomentar maka akan saya simpan juga link sobat d blog ini. Owh ia jangan lupa di follow juga ya.<br>Anonymoushttp://www.blogger.com/profile/04734618468163115287noreply@blogger.com1tag:blogger.com,1999:blog-3155849710910275961.post-56724003443001280902012-12-19T20:34:00.002-08:002012-12-19T20:43:34.205-08:00Hasil Limbah Metabolime<div style="text-align: justify;">
Beberapa zat sisa yang bersifat racun (toksik) bagi tubuh antara lain adalah limbah yang mengandung nitrogen. Nitrogen ini dihasilkan ketika makanan di rombak menjadi karbohidrat dan lemak. Sebagian lagi dihasilkan ketika makanan di rombak menjadi energi. Produk nitrogen itu adalah amonia yang bersifat sangat toksik. Beberapa hewan merubah amonia menjadi urea atau asam urat yang kurang toksik terlebih dahulu sebelum di keluarkan dari tubuh.<br />
<br />
1. Amonia
Amonia adalah hasil deaminasi yang terjadi tertama dalam hati, dan bersifat sangat beracun. Jika amonia tertimbun dalam tubuh akan berakibat fatal. Oleh karena itu amonia harus segera diubah dengan cara memakainya dalam aminasi asam keto, aminasi asam glutamat, serta pembentukan urea.
Pada mamalia, amonia terutama berasal dari deaminasi glutamin pada ginjal. Pembentukan amonia pada tubulus ginjal sangat penting untuk keseimbangan asam basa.<br />
<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiHiGYJOZe2RqUZw3uIhEn62TQhjJlHo6kLwNyVMSUSx_PuyjdUYZxCD3SeqTF5GexH2jVvWe3lv_GcNlwHzSihS9-mlJvdF3yNMrW4A-Fw1Kdst8pLHhyycTCkQTGBmkXYO1uhJz5GAoM/s1600/amonia.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiHiGYJOZe2RqUZw3uIhEn62TQhjJlHo6kLwNyVMSUSx_PuyjdUYZxCD3SeqTF5GexH2jVvWe3lv_GcNlwHzSihS9-mlJvdF3yNMrW4A-Fw1Kdst8pLHhyycTCkQTGBmkXYO1uhJz5GAoM/s320/amonia.png" height="200" width="320" /></a></div>
.<br />
<br />
<div style="text-align: justify;">
2. Urea
Urea berasal dari bahan organik tertentu seperti asam amino dan purin. Pembentukan urea terjadi di hati. Sistem sirkulasi kemudian akan membawa urea ke organ eksresi, yaitu ginjal. Urea sangat mudah larut dalam air dan sifat racunnya 100.000 kali lebih kecil daripada amonia. Pembentukan urea berasal dari ornitin, sitrulin, dan arginin yang disebut daur ornitin. <br />
<br />
<i>Daur ornitin</i><br />
Langkah-langkah pembentukan urea:<br />
<ul>
<li>Sitrulin dibentuk dengan penambahan CO2 dan amonia pada ornitin. CO2 dan amonia berasal dari karbamilfosfat. Karbamilfosfat berasal dari CO2 dan amonia, dan membutuhkan energi dari ATP. </li>
</ul>
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiXT_2cR8pEz1WNzaNTx_AKY3u1CWbhRZ6PLrE54MePtvZHUQiiHUU4-UZ-rRf7nLPpqnxttvGkkIyGVyl1XlBG3Nu2hLD8zwJvhblsZ3QnRJ4093I6QmF-KgaAzeku-4zeei2S6_rcK0Q/s1600/daur+ornitin.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiXT_2cR8pEz1WNzaNTx_AKY3u1CWbhRZ6PLrE54MePtvZHUQiiHUU4-UZ-rRf7nLPpqnxttvGkkIyGVyl1XlBG3Nu2hLD8zwJvhblsZ3QnRJ4093I6QmF-KgaAzeku-4zeei2S6_rcK0Q/s320/daur+ornitin.png" height="400" width="305" /></a></div>
<ul>
<li>Dari sitrulin akan terbentuk arginin dalam dua langkah intermediet. Langkah pertama, sitrulin dan aspartat membentuk arginosuksinat yang memerlukan ATP dan ion Mg. Pada tahap kedua terbentuk arginin dari arginosuksinat.</li>
</ul>
<br />
3. Asam urat
Asam urat pada manusia berasal dari pemecahan asam nukleat. Asam urat tidak diperlukan oleh tubuh. Asam urat bersifat tidak larut. Pada beberapa orang, konsentrasi asam urat sangat tinggi sehingga asam urat mengendap. Kristal asam urat berbentuk seperti jarum. Jika asam urat terhimpun dalam persendia, akan timbul rasa nyeri. Penyakit asam urat di kenal sebagai “gout” batu ginjal. Lihat rumus asam urat berikut:
<br />
<div class="separator" style="clear: both; text-align: center;">
<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgIYyCbUsmNs3LhXsGJhLvV9HmCUYi4N2kllwdEqoRYDJ-o9DdIt61GHXJskukwjRfYe-vpJeahStqiIgxHsfn-WlLhuI_Yg-Jox_ZdI7-2UsS_tVhp0lIak32TfEmDyP-8mD7xJ0_gDnQ/s1600/asam+urat.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgIYyCbUsmNs3LhXsGJhLvV9HmCUYi4N2kllwdEqoRYDJ-o9DdIt61GHXJskukwjRfYe-vpJeahStqiIgxHsfn-WlLhuI_Yg-Jox_ZdI7-2UsS_tVhp0lIak32TfEmDyP-8mD7xJ0_gDnQ/s320/asam+urat.png" height="273" width="320" /></a></div>
</div>
</div>
Anonymoushttp://www.blogger.com/profile/04734618468163115287noreply@blogger.com3tag:blogger.com,1999:blog-3155849710910275961.post-63785851519621317952012-11-30T22:38:00.003-08:002012-11-30T22:38:42.421-08:00PERTUMBUHAN DAN PERKEMBANGAN TUMBUHAN<div style="text-align: justify;">
<span style="color: blue;"><i><span style="color: black;"> </span>Pertumbuhan</i></span> adalah proses pertambahan volume yang irreversible (tidak dapat kembali)karena adanya pembelahan mitosis atau pembesaran sel dan dapat pula disebabkan oleh keduanya. Pertumbuhan dapat diukur dan dinyatakan secara kuantitatif, contohnya petumbuhan batang tanaman dapat diukur dengan busur pertumbuhan atau Auksanometer.<span style="color: cyan;"><i>(Pratiwi, 2006)</i></span><br />
<span style="color: blue;"><i> Perkembangan</i></span> adalah terspesialisasinya sel-sel menjadi struktur dan fungsi=fungsi tertentu. Perkembangan tidak dapat dinyatakan dengan ukuran, tapi dapat dinyatakan dengan perubahan bentuk dan tingkat kedewasaan.<span style="color: cyan;"><i>(Pratiwi, 2006)</i></span>
<br />
Perkembangan awal suatu tumbuhan secara garis besar melalui tiga tahap, yaitu pembelahan sel, morfogenesis, dan differensiasi seluler.<br />
<ol>
<li>Pembelahan sel,</li>
<li>Morfogenesis (perkembangan bentuk)</li>
<li>Differensiasi seluler
</li>
</ol>
Tumbuhan bertambah tinggi dan besar disebabkan dua hal berikut.<br />
<ol>
<li>Pertambahan jumlah sel sebagai hasil pembelahan mitosis pada meristem (titik tumbuh)primer dan skunder.</li>
<li>pertambahan komponen-komponen seluler dan adanya differensiasi sel. misalnya penyerapan air kedalam vakuola yang menyebabkan sel membesar dan sel terbentuk jaringan, organ, dan individu melalui differensiasi sel dan/atau spesialisasi.
</li>
</ol>
<i>Fase Pertumbuhan Tumbuhan:</i><br />
<ol>
<li>Perkecambahan</li>
<li>Pertumbuhan dan Perkembangan Organ
</li>
</ol>
<i>Faktor yang mempengaruhi pertumbuhan dan perkembangan:</i><br />
<ol>
<li>Faktor luar, Seperti makanan, air, suhu, kelembapan, cahaya</li>
<li>Faktor dalam, Seperti gen dan hormon, </li>
</ol>
</div>
Anonymoushttp://www.blogger.com/profile/04734618468163115287noreply@blogger.com2