Gastroenterology is a medical specialty that deals with the normal functions, disorders, and diseases affective the digestive system. Gastroenterologists are specially trained in all areas of the digestive system which includes the gastrointestinal tract, pancreas, liver, bile ducts, and gallbladder. It involves a detailed understanding of the normal physiology of the gastrointestinal organs as well as common conditions such as polyps, hepatitis, ulcers, colitis, and pancreatitis.