Earthworms move by alternate extension and contraction of the body using muscles. Tiny bristles on the underside of the body help in gripping the ground. Snails move with the help of a muscular foot.

A worm’s body is covered in ribbed muscles or segments. Each segment has tiny bristles or hairs called setae that help the worm move. Worms use their muscles to push their front end forward then use the bristles to hold that end in place while the back end catches up.

While earthworms do not have legs, they do have muscles. They have muscles that circle their body and muscles that go from one end to the other. The longitudinal muscles can shorten or lengthen the worm’s body. Using their muscles, earthworms crawl by lengthening its front part and pushing forward through the soil.

Fishes swims by moving its body and tail in opposite direction to each other, they stretch the body and relaxing the tail in opposite direction this forms a curve, then quickly the body moves other side and the tail on the opposite this creates the jerk and pushes the fish in forward direction.

Cockroaches have three pairs of joined appendages attached to the thorax. These are walking legs and help in walking and running. These legs have thick bundle of muscles that helps it to move.

Movement In Cockroach Though cockroaches have two pairs of wings, they can only fly short distances. However, they are able to run and climb very fast. Like all insects, cockroaches have three pairs of legs. They walk in a very interesting manner, moving three legs at a time.

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The movement in earthworm is called peristalsis. During movement the earthworm first extends the front part of the body, keeping the rear portion fixed to the ground.