ANATOMY

Detailed explanation-1: -Your stomach is part of the gastrointestinal (GI) tract. The GI tract is a long tube that starts at your mouth. It runs to your anus, where stool (poop) leaves your body. The GI tract is a key part of your digestive system.

Detailed explanation-2: -The upper GI tract is generally considered to be the mouth, esophagus, stomach, and finally the first part of the small intestine (duodenum). The lower GI tract runs from the small intestine to the large intestine (colon) to the anus.

Detailed explanation-3: -esophagus. stomach (and duodenum) small intestine (or small bowel) colon (or large intestine/bowel) and rectum.