Worms are animals that have long bodies and no legs. They live on land, in the ocean, and sometimes in other animals. There are three groups of worms: segmented worms, roundworms, and flatworms. A roundworm is shaped like a long round tube, while flatworms have flat bodies and are sometimes brightly colored with different patterns. Segmented worms look like they are made of many small pieces. Earthworms eat dead plants and animals and make food for living plants, but worms that live in other animals can make them sick. Worms are important because they change dead plants and animals into nutrients for plants to use and