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Investigate how muscles in the body wall and small bristles enable earthworms to move through soil

Investigate how muscles in the body wall and small bristles enable earthworms to move through soil
Investigate how muscles in the body wall and small bristles enable earthworms to move through soil
Locomotion of the earthworm (Lumbricus)
Encyclopædia Britannica, Inc.
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Transcript

NARRATOR: The earthworm's characteristic crawling movement is caused by the action of muscles in the body wall. These lengthen and shorten the body in wavelike motions. Four pairs of tiny hard bristles on each segment help the worm grip the ground and hold onto the side of the burrow.