The fluid-filled cavity that aids movement in animals like earthworms hydrostatic skeleton. A hydrostatic skeleton is a structure in some soft-bodied animals where a fluid-filled cavity is used to support the body and help with movement.
Hydrostatic Skeleton: The fluid-filled cavity that aids movement in animals like earthworms hydrostatic skeleton. A hydrostatic skeleton is a structure in some soft-bodied animals where a fluid-filled cavity is used to support the body and help with movement.
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