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Blume CH. 13.4 Echinoderms

What kind of symmetry do echinoderms have? Radial
What is a characteristic unique to echinoderms? A water-vascular system
How many species of echinoderms are there? 6,000
What will happen is a sea star looses an arm? It will regenerate.
What is an adaption brittle stars have? Limbs that are easily broken off
What do some sea urchins have on their spines? Toxic points
What do sea cucumbers do when threatened? Expel their internal organs
What are echinoderms used for? Food and possible medicines
When did echinoderms first appear? 400 Billion years ago
Created by: c13ell