Earthworms and sea anemones do not have bones. They move by the actions of muscles on a fluid-filled compartment. This system is called a(n)

Question

Quizplus · Accepted Answer

The system described in the question is that of a hydrostatic skeleton, which relies on fluid pressure to provide support for movement. Endoskeletons are internal frameworks of bones, while circular and longitudinal skeletons refer to arrangements of muscles and connective tissue.

Earthworms and Sea Anemones Do Not Have Bones