The movement of earthworms is dependent on

Question

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The movement of earthworms is dependent on all of these structures. Circular muscles help earthworms elongate and contract their body segments, while longitudinal muscles aid in backward or forward movement. The hydrostatic skeleton enables earthworms to move their bodies through the contraction and relaxation of muscles surrounding fluid-filled spaces. The setae help earthworms grip the soil and anchor themselves while moving along.

The Movement of Earthworms Is Dependent on