The cells lining these villi absorb dietary nutrients including sugars, amino acids, and fatty acids.
The jejunum is able to absorb these nutrients because it is lined with finger-like projections that are called villi.
The nutrients are absorbed into the bloodstream where they can be utilized for energy by the entire body.
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In addition to supporting the jejunum, the mesentery also insulates the jejunum, helping to keep it warm.
Muscle in the jejunum helps to move food through the digestive system.
Disorders
As part of the small intestine, the jejunum is subject to a number of disorders.
Rarely, Crohn’s disease can manifest as jejunoileitis, or inflammation of the jejunum and ileum.
Patients with Crohn’s disease s typically present with symptoms including cramps, pain, and diarrhea.
There are two important outcomes from this key in of surgery.
Second, because ingested food is diverted past the duodenum, fewer calories and nutrients can be absorbed.
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