Question

Hydrostatic movement in echinodermata

Answer 1

By using hydrostatic pressure, the animal can either protrude or retract the tube feet. Water enters the madreporite on the aboral side of the echinoderm. ... By moving water through the unique water vascular system, the echinoderm can move and force open mollusk shells during feeding.

Answer 2

Answer:

Hydrostatic movement occurs in invertebrates where 'muscles contract' to change the shape of an organism's coelom which help in the production of the pressure of the certain fluid which is filled up in the fluid-filled cavity. This pattern is followed by the 'coelenterates', 'annelids', and 'Echinodermata'.