<peir-vm>UAB-Histology-00136</peir-vm>

The three subdivisions of the small intestine are the duodenum, the jejunum and the ileum. The general microscopic structure is similar in all three parts. In the 21 to 23 feet of small intestine, digestion of food materials continues after leaving the stomach, and its selective absorption occurs.

The serosa is typical, being a layer of mesothelial cells covering a thin loose connective tissue layer.

== Pylorus-Duodenal Junction ==