Salma Layous & Jordan Alexis

How to become an Echinoderm:

First you have to have five part radial symmetry. Next you have to have the unique water vascular system: hydraulic system that moves the tube feet of the sea star. When the valve that creates pressure (ampulla) is closed, the foot extends. When the valve is open, the pressure is released to withdraw the tube feet. Echinoderms can regenerate their own body parts. They do not have blood. Have to be able to feed by ejecting the stomach. Echinoderms can not have eyes. They have to posses light sensitive organs. Next, they have a shell made of calcium carbonate. They have to eat barnacles, snails, sea urchins, clams, and mussels. Echinoderms become sexually mature at about two to three years. Finally, they have to be able to use diffusion to get rid of their nitrogen wastes.
Biology: Echinoderms
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Everything About Crinoids
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