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Phylum Echinodermata – Definition, Classification, Characteristics, Examples

Phylum Echinodermata Definition, Classification, Characteristics, Examples

Echinoderms are coelomates that have pentamerous radial structure, but without distinct brain or head. They possess an endoskeleton composed of calcareous pieces or plates, and a distinct water vascular system that is coelomic in origin that has tube-feet, or podia protruding from the body.

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