Question

Explain in detail about the movement in Earthworm.

Answer 1

Movement in Earthworm:

1. The body of earthworm is made up of many rings joined end to end. It has muscles which help to extend and shorten the body. Under its body it has large number of bristles called setae which are connected with muscles.
2. These bristles help to get grip on the ground. During movement, the earthworm first extends the front part of the body, keeping the rear portion fixed to the ground.
3. Then it fixes the front end and releases the rear end. It then shortens the body and pulls the rear end forward. This makes it move forward by small distances.
4. Repeating such muscle contraction and relaxation the earthworm can move through soil. A slimy substance secreted by its body helps this movement.

Movement in Earthworm: