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Gastroenterology deals with study of normal functioning, diagnosis and treatment of stomach and intestine disorders. The digestive track that starts from the mouth and runs up to the anus, encompasses of various organs such as alimentary canal, esophagus, colon, rectum, pancreas, gallbladder, bile ducts, liver, duodenum, small intestine and large intestine. Gastroenterology deals with the functioning of each organ in the digestive system while focusing on various diseases that may attack them. The study facilitates a thorough understanding of the digestion process, absorption of nutrient values, and excretion. It also discusses the diseases that may affect these organs including polyps, cancer, ulcers, hepatitis, and refluxes.