The jejunum is the midsection of the small intestine, connecting the duodenum to the ileum. It is about 2.5 m long, and contains the plicae circulares, and villi that increase its surface area. Products of digestion (sugars, amino acids, and fatty acids) are absorbed into the bloodstream here.
Not to be confused with the cells of the islets of Langerhans, found in the pancreas, or Langhans giant cell.
Dr. Robert Kwok Dr. Kwok. 1  In the chest: The lungs are in the chest, protected by all those ribs. 2  Chest: In your chest cavity above your diaphram and below your collar bones. 3  Exhalation: blows out a volume of air.  Langerhan: Langerhan cells are spread throughout the body and are part of our immune defense system.