The jejunum is part of the small intestine. It comes before the ileum and after the duodenum. It is the second longest section of the small intestine, with an average length of about 1 metre long. It contains many circular folds and villi; 0.5-1mm long projections which makes the surface area larger to facilitate increased absorption of proteins and lipids.
- ↑ Tortora, G and Derrickson, B (2011). Principles of Anatomy &amp; Physiology, Volume 2. 13th ed. New Jersey: John Wiley &amp; Sons, Inc.. p995-997.