BIOC34H3 Lecture Notes - Pancreatic Duct, Pylorus, Pancreatic Lipase Family
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Lecture 22: the intestines, pancreas and liver: the small intestine. The stomach empties into the small intestine through the pyloric valve. The small intestine itself consists of three main sections. The duodenum is the small section closest to the pyloric valve, about. Chyme from the stomach enters the duodenum as do digestive enzymes from the pancreas and bile from the liver and gallbladder. The jejunum follows the duodenum, and is much longer - a little over a meter. The ileum is the final section of the small intestine, it is approximately 1. 5 meters long and connects via the illeocecal valve to the large intestine. The small intestine is the predominant site of nutrient absorption with the vast majority of nutrient absorption occurring within the first 20%. The small intestine is anatomically designed for large rates of absorption. The inner wall of the small intestine contains numerous protrusions called villi which face into the lumen of the intestine.
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