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The word gastroenterology comes from two Greek words: gastros for stomach and enteron for intestine. Therefore hospital gastroenterology 1_______ deal with illnesses of the digestive system or gastrointestinal (GI) tract. This is basically a long hollow 2_______ about 6.5 metres long going from the mouth to the anus which joins a string of organs including the oesophagus, stomach, small intestine, 3_______, gall bladder, and pancreas. Medical science divides the GI tract into the upper tract and the 4_______ tract – also known as the upper and lower bowels.