hydrostatic system

hydrostatic system
(BRYOZOA: Gymnolaemata)
A method of protrusion of the lophophore in some autozooids; made up of flexible frontal wall or infolded frontal wall sac and attached parietal muscles which contract and raise the lophophore by hydrostatic pressure in the autozooid.

Online Dictionary of Invertebrate Zoology. . 2005.

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