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Echinoderms

Echinoderms. I. Deuterostomes. Radial clevage Enterocoelous coelom formation Determiant clevage Blastopore becomes anus. II. Echinoderm classes. A. Asteroidea-starfish B. Ophiduroidea-brittlestars C. Echinoidea-sea urchins Holothuroidea-sea cucumbers Crinoidea-featherstars.

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Echinoderms

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  1. Echinoderms

  2. I. Deuterostomes • Radial clevage • Enterocoelous coelom formation • Determiant clevage • Blastopore becomes anus

  3. II. Echinoderm classes A. Asteroidea-starfish B. Ophiduroidea-brittlestars C. Echinoidea-sea urchins • Holothuroidea-sea cucumbers • Crinoidea-featherstars

  4. III. Water vascular system • A. Structure • B. Function

  5. IV. Digestive System • A. oral vs aboral surface • B. cardiac vs pyloric stomach • C. hepatic ceca • D. intestine and anus

  6. Starfish feeding on a mussel

  7. V. Reproductive system • A. Different sexes • B. Reproductive products released into open water • C. Regeneration

  8. VI. Ray cross section • 1. Coelom • 2. Calcareous plate • 3. Dermal branchiae • 4. Hepatic ceca • 5. Spine • 6. Radial canal • 7. Pedicellariae • 8. Radial nerve • 9. Tube foot • 10.Sucker

  9. Pedicellariae

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