Gastroenterology is a branch of medicine focused on the study, diagnosis, treatment, and prevention of disorders related to the Gastrointestinal (GI) Tract. This includes the organs involved in the ingestion, digestion, absorption, and elimination of food, such as Oesophagus, Stomach, Small intestine, Large intestine (Colon), Rectum, Anus, Liver, Pancreas, and Gallbladder.