There are over 3,000 species of earthworms around the world. Earthworms range in size from a few inches long to over five feet long. These giant worms live in the rainforests of South America. The brain, hearts, and breathing organs are located in the first few segments of the worm. The rest of the inside of an earthworm is filled with the intestines, which digest its food.
Earthworms eat soil and the organic material in it - like insect parts and bacteria.
The clitellum later forms a cocoon which protects the developing eggs.