Earthworm - Lumbricus terrestris
Earthworms can eat almost anything from blood to cardboard. The earthworms are segmented, reddish brown worms usually a few inches long. The digestive system for earthworms include the pharynx, the esophagus, the crop, the intestine, and the gizzard. Soil enters the earthworms mouth, and moves down the pharynx. The soil would then travel through the esophagus where calcium carbonate is released to rid the worm of its excess calcium. The crop holds the soil, and gizzard digests it uses stones the worm at to grind it completely. The soil moves through the intestine where the nutrients and minerals are absorbed.