Duodenum

The duodenum /ˌduːəˈdinəm/ is the first section of the small intestine in most higher vertebrates, including mammals, reptiles, and birds. In fish, the divisions of the small intestine are not as clear, and the terms anterior intestine or proximal intestine may be used instead of duodenum. In mammals the duodenum may be the principal site for iron absorption.

The duodenum precedes the jejunum and ileum and is the shortest part of the small intestine, where most chemical digestion takes place. The name duodenum is from the Latin duodenum digitorum, or "twelve fingers' breadth".

In humans, the duodenum is a hollow jointed tube about 10–15 inches (25–38 centimetres) long connecting the stomach to the jejunum. It begins with the duodenal bulb and ends at the ligament of Treitz.

Read more about Duodenum:  Function, Sections, Blood Supply, Lymphatic Drainage, Additional Images

Other articles related to "duodenum":

Duodenum - Additional Images
... and inferior duodenal fossæ Duodenojejunal fossa Interior of the stomach Section of duodenum of cat ... X 60 The pancreas and duodenum from behind Transverse section through the middle of the first lumbar vertebra, showing the relations of the pancreas The ... H E stain Duodenum Duodenum Duodenum ...
Circular Folds - Distribution
... They are not found at the commencement of the duodenum, but begin to appear about 2.5 or 5 cm ... In the horizontal and ascending portions of the duodenum and upper half of the jejunum they are large and numerous, but from this point, down to the middle of the ileum, they diminish ... of this portion of the intestine, as compared with the duodenum and jejunum ...
Suspensory Muscle Of Duodenum
... The suspensory muscle of duodenum, also known as the ligament of Treitz (named for Václav Treitz), connects the duodenum of the small intestine to the diaphragm ... muscle from the horizontal and ascending parts of the duodenum ... When it contracts, the suspensory muscle of the duodenum widens the angle of the duodenojejunal flexure, allowing movement of the intestinal contents ...
Hepatic Lymph Nodes
... of the gastroduodenal artery, in the angle between the superior and descending parts of the duodenum an outlying member of this group is sometimes found above the duodenum on the right gastric (pylor ... of the hepatic chain receive afferents from the stomach, duodenum, liver, gall-bladder, and pancreas their efferents join the celiac group of preaortic glands ...
Pylorus
... πυλωρός, "gate guard") is the region of the stomach that connects to the duodenum (the beginning of the small intestines) ... the pyloric canal, which connects to the duodenum ... canal which lets food pass from the stomach to the duodenum ...