A french fry follows a certain track to be digested. The french fry starts in the mouth when the person eats the fry. The teeth digest the french fry by cutting it into smaller pieces. The saliva is also working to break down the starches in the fry. In the esophagus, peristalsis is used to push the fry down to the stomach. In the stomach, the muscles churn the fry and mix the fry with pepsin and hydrochloric acid and make it into a liquid. The small intestine then mixes the french fry with enzymes and bile. The large intestine is where the leftover water is absorbed. Then finally comes the rectum and anus where the french fry is able to leave the body.