It absorbs water and some remaining mineral nutrients from the food matter. This muscular tube is about 4 to 5 feet long. The ileum empties into the colon (the first part of the large intestine). The jejunum and ileum: These parts make up most of the small intestine, and are where most of the nutrients in food are absorbed into the bloodstream.Fluids from the pancreas and liver enter the small intestine here, helping to further digest the food. A short distance from where the duodenum attaches to the stomach, the pancreatic duct and bile duct enter the duodenum at the ampulla of Vater. The duodenum: This is the first section and is only about a foot long.Even though it's called the small intestine, it's actually the longest section of the GI tract (about 20 feet long). The small intestine continues breaking down the food and absorbs most of the nutrients. The food and gastric juices are mixed into a thick fluid, which is then emptied into the small intestine (also known as the small bowel). The stomach is a sac-like organ that helps the digestive process by mixing the food with gastric juices. To understand small intestine cancer, it helps to know about the small intestine and how it works.Īfter you chew and swallow your food, it goes through the esophagus, a tube that carries food through the neck and chest and into the stomach. The GI tract processes food for energy and rids your body of solid waste.Īlthough the small intestine makes up the largest part of the GI tract, small intestine cancers are much less common than most other types of GI cancers (such as colon, rectal, stomach, and esophagus cancers) in the United States. The small intestine is part of the gastrointestinal (GI) tract, also known as the digestive tract. Small intestine cancer starts when cells in the small intestine start to grow out of control. To learn more about how cancers start and spread, see What Is Cancer? Cells in nearly any part of the body can become cancer, and can spread to other areas of the body. Cancer starts when cells in the body begin to grow out of control.
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