duodenum
Sign in to saveThe duodenum is the first section of the small intestine in most vertebrates, including mammals, reptiles, and birds. In mammals, it may be the principal site for iron absorption. The duodenum precedes the jejunum and ileum and is the shortest part of the small intestine.
AI overview
The duodenum is the first and shortest section of the small intestine, located before two other sections called the jejunum and ileum. In mammals, it may be the principal site where iron is absorbed from food into the body.
AI-generated from the Wikipedia summary — may contain errors.
Key facts
- Anatomy.Name
- Duodenum
- Anatomy.Latin
- duodenum
- Anatomy.Image
- Tractus intestinalis duodenum.svg
- Anatomy.Caption
- Image of the gastrointestinal tract, with the duodenum highlighted.
- Anatomy.Image2
- Duodenumanatomy.jpg
- Anatomy.Caption2
- Diagram of the human duodenum with major parts labelled
- Anatomy.Precursor
- Foregut (1st and 2nd parts), midgut (3rd and 4th part)
- Anatomy.System
- Digestive system
- Anatomy.PartOf
- Small intestine
- Anatomy.Pronunciation
- ,
- Anatomy.Artery
- Inferior pancreaticoduodenal artery, superior pancreaticoduodenal artery
- Anatomy.Vein
Article
19 sectionsContents
- Overview
- Parts
- Blood supply
- Lymphatic drainage
- Histology
- Variation
- Gene and protein expression
- Function
- Clinical significance
- Ulceration
- Celiac disease
- Cancer
- Obesity and diabetes
- Inflammation
- Etymology
- Additional images
- See also
- References
- External links
The duodenum is the first section of the small intestine in most vertebrates, including mammals, reptiles, and birds. In mammals, it may be the principal site for iron absorption. The duodenum precedes the jejunum and ileum and is the shortest part of the small intestine.
In humans, the duodenum is a hollow jointed tube about long connecting the stomach to the jejunum, the middle part of the small intestine. It begins with the duodenal bulb, and ends at the duodenojejunal flexure marked by the suspensory muscle of duodenum. The duodenum can be divided into four parts: the first (superior), the second (descending), the third (transverse) and the fourth (ascending) parts.