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Unformatted text preview: o Brittle stars o Pentameric symmetry Groups of five o Endoskeleton of interlocking calcium carbonate plates Covered by epidermis o Move with tubular feet Water filled canal system Extended or retracted with water pressure Chordates Chordata 06/03/2008 18:39:00 Notochord Support system Dorsal hollow nerve cord 06/03/2008 18:39:00...
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- Spring '08