Monday, January 23, 2012

Dissecting Echinoderms!





Oral Side of starfish ^
aboral side of starfish^
Starfish
Asterias rubens

~skeletal plates(ossicles)- provide structure and allow movement, acting as joints

~ampulla-muscular tissue structure that controls the water in the foot and squeezes it out

~pyloric caecum- helps the digestion through absorption.

~pyloric stomach- connects digestive glands

~tube feet-they help the starfish move with suction cups



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