The digestive system, which refers to the gastrointestinal (GI) tract, begins in the mouth and travels throughout the body, including the thorax and abdomen, before exiting at the anus. It is comprised of the oesophagus traversing through the chest and connecting to the stomach, then the intestines, colon, appendix, and rectum. The liver, biliary tract, gallbladder, pancreas, and spleen are located in nearby structures along this course. Common GI problems and symptoms that bring people to see doctors include food poisoning, nausea, vomiting, passing blood, jaundice, heartburn, indigestion, bl…

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