How many parts does the small intestine have?
Quick Answer
The small intestine has 3 parts: the duodenum, jejunum, and ileum. Despite its name, it is the longest part of the digestive tract.
The Full Story
The small intestine is divided into three sections: duodenum, jejunum, and ileum. The duodenum receives stomach contents and bile, the jejunum absorbs many nutrients, and the ileum absorbs specific substances such as vitamin B12 and bile salts. It is called 'small' because of its narrower diameter, not its length. In adults, it is typically about 6 metres long, though length can vary. Its folded lining and microscopic villi greatly increase the surface area for absorption.
Key Facts
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