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DIGESTIVE SYSTEM The digestive system makes nutrients available to all body cells. Any food you eat must be broken down into nutrients that your cells can use. Your digestive system does this job, which is called DIGESTION. DIGESTION is the process that breaks food into forms that your cells can use. DIGESTIONS begins in the As soon as you bite food, your digestive system starts working!! PARTS OF THE DIGESTIVE SYSTEM Mouth Esophagus Stomach Small Intestine Large Intestine DIGESTION begins in your mouth. Your teeth and chemicals in your saliva start to break down the food. The food you swallow enters a tube called the esophagus. The esophagus is about 25 cms long. Smooth muscles in its walls contract and move the food toward the stomach. Esophagus Then, the partly digested food enters your stomach. Muscles in the walls of your stomach mash the food. They mix it with juices until it is a thick liquid. Muscles then push the food into the small intestine. The small intestine is a twisted tube that is about 7 meters long. Most digestion takes places during the 3 to 6 hours that food stays here. Juices break the food into nutrients. Anything that can not be digested and some liquid move into the large intestine. It is about 1.5 meters long. It removes the liquid and stores the solid waste until it leaves the body. THE DIGESTIVE SYSTEM THE DIGESTIVE SYSTEM