Transcript Echinoderms - Mohawk Valley Community College

Echinoderms
I.
A.
B.
C.
D.
Deuterostomes
Radial clevage
Enterocoelous coelom
formation
Determiant clevage
Blastopore becomes anus
II.
A.
B.
C.
D.
E.
Echinoderm classes
Asteroidea-starfish
Ophiduroidea-brittlestars
Echinoidea-sea urchins
Holothuroidea-sea cucumbers
Crinoidea-featherstars
III.
Water vascular system
• A. Structure
• B. Function
IV.
Digestive System
• A. oral vs aboral surface
• B. cardiac vs pyloric
stomach
• C. hepatic ceca
• D. intestine and anus
Starfish feeding on a mussel
V.
Reproductive system
• A. Different sexes
• B. Reproductive
products released into
open water
• C. Regeneration
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
Pedicellariae