The document discusses disorders of the gastrointestinal tract. It begins by describing the functions of the bowel, including digesting food, absorbing nutrients, and moving contents through at the right rate. Inflammation and damage to the bowel wall can lead to hemorrhage, perforation, malabsorption, and sepsis. Hemorrhage in different parts of the GI tract produces different symptoms, such as melena, hematemesis, or occult blood. Obstruction in the bowel can cause paralysis, distension, and ischemia in surrounding tissues. Malabsorption disorders like celiac disease can result in altered intestinal absorption.