Small Intestine Summary

when they cut it open. But that's quite a bit of ''emptiness,'' since the jejunum is about 8 feet (or 2.4 meters) in length!

The last portion of the small intestine is the ileum, which is located at about the level of our body ''flanks'' (tie). (Remember that the flank is the portion of the back lying below the ribs, but above the top of the titum or hip bone.) The ileum is lighter in color, slightly narrower in diameter, and has a thinner wall, compared to the jejunum. The jejunum also has circular folds within its lining, and also larger villi than the ileum.

The jejunum and ileum basically complete the processes of chemical digestion and absorption of nutrients that began in the duodenum.

We end our discussion of the small intestine with the following structural summary:


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