Small Intestine
The small intestine consists of three parts: the
duodenum, the jejunum, and the ileum
The entire small intestine is about 6m long (4.6-
9m). The duodenum is about 25 cm long. The
jejunum, constituting about two-fifths of the
total length of the small intestine, is about 2.5m
long; and the ileum, constituting three-fifths of
the small intestine, is about 3.5m long.
Two major accessory glands, the liver and the
pancreas, are associated with the duodenum.