About the Digestive system of C. elegans
This type of roundworm eats mostly bacteria and types of fungi. There are many different tissues and cells in this roundworm's digestive system. The first part of the system is done in what is known as the foregut of the worm, or the part near the head. The food is taken in from the mouth at the buccal cavity near the head of the organism. The ingested food is pumped along the digestive track by the muscular pumping of the pharynx at the anterior end. It then goes through the pharynx and through the esophagus. This is where the foregut ends and the midgut starts. The midgut is simply the intestine of the worm, running through the whole animal to the anus. The intestine has no muscular structure inside of it, but rather the amount of consumed food inside the body is controlled by the muscles outside of the intestine. When the nutrients are taken in from the needed food the waste is pushed out of the body towards the back. The hindgut consists of the rectum and anus, which disposes of everything not needed in the intestine.