Class 9 Biology Diversity In Living Organisms Echinodermata

Echinodermata

The organism that belongs to this group are spiny skinned organisms.

They are free-existing marine animals.

They are triploblastic.

They have a coelomic cavity.

These organisms use an irregular water-driven cylindrical system for movement.

They have hard calcium carbonate structures which is their skeleton.

Examples of organisms belonging to this group are starfish and sea urchins.

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