1. Evolution of the Body Cavity
Echinodermata

2. ECHINODERMATA: Starfish to Sea Cucumbers…
Basket starfish
Red Sea Urchin
Endoskeleton,Water vascular system ("tube feet"), Gut complete, Decentralized nervous system, Marine.

3. Coelomates Animals with a coelom (body cavity).
Body cavity is a space for specialized organs systems within the body.

4. Coelomate
Echinoderms are coelomate

5. General Characteristics
Endoskeleton, Water based vascular system ("tube feet"), Complete digestive systems, Decentralized nervous system,
Only Phylum that is entirely marine based
Come in different shapes sizes but all have some sort of spines on skin

6. Sunstar
Sea Cucumber
Most starfish are predators, feeding on sessile or slow-moving prey such as mollusks and barnacles. Many, but not all, starfish are able to turn a portion of their stomachs out through the mouth, and thus digest food outside of the body.

7. Sand Dollar
Purple Sea Urchins

8. Most starfish are predators, feeding on sessile or slow-moving prey such as mollusks and barnacles. Many, but not all, starfish are turn a portion of their stomachs out through the mouth, digest food outside of the body.

9. Phylum Characteristics Summary
Endoskeleton made of CaCO3 (Calcium Carbonate) Water Vascular Tube System – allows for movement Regenerative abilities Separate sexes (Male and Female) that reproduce externally. Spiny skin for support and protection