An Example of a Hydrostatic Skeleton Would Be

Question

An example of a hydrostatic skeleton would be
A) The chitin of an arthropod
B) Bones in a fish
C) Axial skeleton of a whale
D) A bivalve foot

Accepted Answer

A hydrostatic skeleton is a structure found in many soft-bodied animals, consisting of a fluid-filled cavity, the coelom, surrounded by muscles. Unlike hard skeletons, which provide a rigid framework for the body, a hydrostatic skeleton allows for movement through the contraction of surrounding muscles, which change the shape of the fluid-filled cavity. The foot of a bivalve, such as a clam, uses a hydrostatic skeleton to extend out of the shell and move or dig into the sand. The other options (A, B, C) refer to hard or external skeletons and are not examples of hydrostatic skeletons.