Question

Hydrostatic movement in coelentrata, annelida and echinodermata

Answer 1

Answer:

Additionally, a hydrostatic skeleton helps in support and movement. In the Cnidaria, the water-filled gastrovascular cavity acts as a hydrostatic skeleton. A hydrostatic skeleton is composed of water or body fluids in a cavity of the body. The contractile elements of the body wall act against this hydrostatic skeleton.

Explanation:

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