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Describe the three parts of small intestine.

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The small intestine is the longest part of the alimentary canal. 

It comprises of 3 parts – duodenum, jejunum and ileum.

  • Duodenum is C-shaped and receives the bile duct (from liver) and pancreatic duct (from pancreas).
  • Jejunum is the middle part of the small intestine. It is a short region. It contains the enzymes like sucrase, maltase, lactase and lipase.
  • Ileum forms the lower part of the small intestine. It is the longest part of the small intestine. It contains minute finger like projections called villi. Absorption of food takes place here.

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