Echinodermata | Diversity In Living Organisms | Biology | Class 9

Moving on with the classification of animals we come to Phylum Echinodermata. Echinoderms are animals with spiny skin. They live exclusively in a marine habitat. They are free-living animals. The larvae show bilateral symmetry whereas the adults show radial symmetry. These animals are triploblastic and have a coelomic cavity. They have a peculiar water driven tube system that helps them in moving around.  They also have a hard exoskeleton that is made up of calcium carbonate. Examples are Starfish, Sea cucumber, Sea Urchin.

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Let us learn more about echinoderms, in this video.

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