The digestive system is an intricate system that can be disrupted by disease, diet and emotional stress. While some digestive problems can be remedied with medicine and lifestyle changes, others require surgery. An Med Health physicians use cutting edge technology, such as gastrointestinal ultrasound, to diagnose and treat digestive conditions. Gastrointestinal ultrasound provides more detailed images of the digestive system than other imaging studies. It allows physicians to examine your esophageal and stomach linings, as well as your upper and lower digestive tract. The primary role of the digestive system is to help the body break down and absorb food. Also known as the gastrointestinal (GI) tract, it includes the mouth, esophagus, stomach, small intestine, large intestine — also called the colon — rectum, and anus. Tiny glands in the mouth, stomach, and small intestine produce juices to help digest food. The digestive system also contains a layer of smooth muscle that moves food along the tract.