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ZoologyLabNotes - 16-cell stage 8-cell stage Two cell stage...

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ZOOLOGY LAB NUMBER 8 1. F o s si l crinoid Phylum: Echinodermata Class: Crinoidea 1
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2. Aboral and Oral sides of Sea star Phylum: Echinodermata Class: Asteroidea 2 Madreporite (Aboral side) Mouth (oral side)
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3. Dissected Asterias sp. Phylum: Echinodermata Class: Asteroidea Gonads-Male short/Female along the arm all the way Pyloric caecum/Digestive glands/Digestive divertucula WVS flow = Madreporite-Stone canal-Ring canal-Radial canal-Lateral canal-Tube feet Pyloric stomach on Aboral side. (Cardiac stomach is on oral side) 3
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3. Dissected Asterias sp. Phylum: Echinodermata Class: Asteroidea Ambulacral ridge Tube feet Gonad Gonads (under the removed digestive glands) 4
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4. Arm tip of Sea Star Asterias sp. (C.S) Phylum: Echinodermata Class: Asteroidea 5
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Blastopore Early Gastrula 4-cell stage Blastula 64 cells
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Unformatted text preview: 16-cell stage 8-cell stage Two cell stage Fertilized egg no nucleus Unfertilized egg with nucleus Blastocoel 6 5. Developmental stages of Sea Star, Asterias sp. (W.M) Phylum: Echinodermata Class: Asteroid Gastrula 7 6. Brittle star Phylum: Echinodermata Class: Ophiuroidea 8 7. Sea Urchin, Arbacia sp. Phylum: Echinodermata Class: Echinoidea Aristotle’s Lantern 9 8. Aristotle’s Lantern of Sea Urchin Phylum: Echinodermata Class: Echinoidea 10 9. Test of a Sand Dollar (not a sea urchin) Phylum: Echinodermata Class: Echinoidea 11 10. Sea Cucumber Phylum: Echinodermata Class: Holothuroidea 12 11. Dissected Sea Cucumber Phylum: Echinodermata Class: Holothuroidea 13 12. Echinoderm Specimens. 14...
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