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The duodenum is a short portion of the small intestine connecting it to the stomach. It is about 10 inches (25 cm) long, while the entire small intestine measures about 20 feet (6.5 meters).
The duodenum is attached to the stomach by the pyloric sphincter. The duodenum is a short portion of the small intestine connecting it to the stomach. The pancreatic duct, which introduces bile and pancreatic juice into the small intestine, is directly connected to the descending duodenum.he duodenum is a short portion of the small intestine connecting it to the stomach. The pancreatic duct, which introduces bile and pancreatic juice into the small intestine, is directly connected to the descending duodenum.