The small intestine is shaped like a coiled tube, that is approximately 17 feet long when laid out. It is 4cm in diameter.
The first 9 inches of the small intestine is called the duodenum.
The middle portion of the small intestine is called the jejunum.
The last portion of the small intestine is called the ileum.
After food has been digested, nutrients are absorbed by the intestinal villi. The microvilli secrets large amounts of fluid which help keep chyme in a fluid state (which helps absorb nutrients). Goblet cells in this mucus help protect the intestinal wall from acidic chyme and the action of the digestive enzymes.
The small intestine is separated from the large intestine by the ileocecal valve.
The first 9 inches of the small intestine is called the duodenum.
The middle portion of the small intestine is called the jejunum.
The last portion of the small intestine is called the ileum.
After food has been digested, nutrients are absorbed by the intestinal villi. The microvilli secrets large amounts of fluid which help keep chyme in a fluid state (which helps absorb nutrients). Goblet cells in this mucus help protect the intestinal wall from acidic chyme and the action of the digestive enzymes.
The small intestine is separated from the large intestine by the ileocecal valve.
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