Annelida
Annelida means "ringed". Some examples of annelids are earthworms, bristle worms, marine worms, and leeches. Annelids are usually long, slimy, and have segmented bodies. Earthworms have blood vessels that carry it's food to all of it's cells and have open circulatory systems. Earthworms also have coeloms (SEE loms) which are liquid-filled spaces that hold all of their internal organs. Earthworms have crops, where their food is stored, and gizzards, which grind their food. Earthworms lack respiratory systems, and instead exchange gases by diffusion through their moist skin. Earthworms have setae, which are little bristles, to move around and tunnel through the earth, loosening the soil and letting air reach the plant roots. -hr