Subdivision of digestive tract that connects the stomach to the large intestine and is where much of the digestion and absorption of food takes place (with the exception of ruminants). The mammalian small intestine is long and coiled and can be differentiated histologically into: duodenum, jejunem, ileum[WP,cjm,Kardong].

http://upload.wikimedia.org/wikipedia/commons/8/82/Stomach_colon_rectum_diagram.svg

The terminal region of the mid intestine is comprised of specialized enterocytes that appear to play a role in mucosal immunity. Wallace et al, 2005.[TAO]

small intestine, small bowel

uberon

intestinum tenue, anterior intestine, mid intestine

Intestinal surface area also is increased in amphibians and reptiles by internal folds and occasionally by a few villi. The intestine can be divided into a small intestine and a slightly wider large intestine.[well established][VHOG]

UBERON:0002108

http://purl.obolibrary.org/obo/uberon.owl, http://purl.obolibrary.org/obo/cl.owl

• duodenum

• duodenum

• wall of small intestine
• duodenum