1. Echinoderms

2. Spiny skin
Radial symmetry
Water vascular system

3. Form and Function Water vascular- respiration, circulation, movement.
Madreporite- connects the ring canal to the outside.

5. Tube feet- movement.
Feeding- sea stars push out stomach and enzymes break down shells.
Excretion- cellular through tube feet(ammonia), solid through anus.
External fert.

6. Groups of Echinoderms

7. Sea Urchins and Sand Dollars
Large solid plates
Most eat algae

10. Brittle Stars Found on coral reefs Can shed an arm to escape
                                                                                           
Found on coral reefs
Can shed an arm to escape
Filter feeders

12. Sea Cucumbers
“ Moving pickles”
Detritus feeders

13. Slide 13

16. Sea Stars
Most are carnivores
Eat bivalves
Can repair themselves

19. Sea Lilies and Feather Stars
Filter feeders
Live in the tropics

20. Feather Star (Note the depth)