What pushes the food through digestive system?

The process by which food moves through the digestive tract is called peristalsis. Peristalsis is a series of involuntary muscle contractions that move food from the esophagus to the stomach, through the small intestine, and finally to the large intestine. The muscles in the digestive tract are coordinated by the nervous system, which sends signals to cause the muscles to contract and relax. Peristalsis is also aided by the presence of hormones and digestive enzymes, which help to break down food and facilitate its passage through the digestive tract.