Pancreas. Computer artwork of a human pancreas. The pancreas is between 15 and 20 centimetres in length. It is located in the abdominal cavity behind the stomach. Cells in the pancreas secrete digestive juices and the hormones insulin and glucagon, which regulate blood sugar levels. The digestive juices collect in a duct (not seen), which runs the length of the pancreas. The juices are discharged into the duodenum, the beginning of the small intestine that receives food from the stomach.
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