The Earthworm, is a very common worm, and the most common organism within its phylum. The digestive system of the earthworm, is like most other organism's within its phylum. It starts in the mouth, which is located on the underside of it's head. It continues throughout the body as an unsegmented section traveling throughout the entire body. It starts of by traveling from the mouth to the pharynx; a section of the digestive system in which the food is coated in a slimy coat, making the food be able to travel through the body faster and smoother. The next part, contains a section called the esophagus, in which the slimy food is combined with calcium carbonate. This is done to balance out the acid within the food so the worm isn't effected by the negative affects of the acid. The third part in the digestive system is the crop, which is a temporary food storage for the worm. The fourth part is the gizzard, where the food is churned inside it's body. This is done because the earthworm doesn't have teeth to do it for them, so muscles within the worm crush the food for the worm. The final part of the digestive system of an earthworm, is called the intestine. Inside the intestine, there a "friendly bacteria" where the bacteria absorb the food in the gizzard, and get rid of unneeded nutrients called waste. The bacteria is then absorbed by the worm, feeding it and keeping it alive. The waste is then deposited in the anus, which then produces feces.