The earthworm is a well-known fishing bait, and it is sometimes called a fishworm or angleworm. Earthworms contribute to the growth of plants. The soil is loosened and mixed as the earthworm burrows through the ground.
Worms are also important food for birds.
They have a smooth body that is made up of rings called annuli. The reddish-brown body of the earthworm is built like two tubes, one inside the other. The inner one is the digestive tube and the outer one is the body wall. Earthworms do not have eyes or ears, but they have a mouth and are sensitive to heat, light, and touch. A worm crawls by lengthening its front part and pushing through the soil, then pulling the hind part up.