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jejunum
Sign in to saveThe jejunum is the second part of the small intestine in humans and most higher vertebrates, including mammals, reptiles, and birds. Its lining is specialized for the absorption by enterocytes of small nutrient molecules which have been previously digested by enzymes in the duodenum.
The jejunum is the middle section of your small intestine, located after the first part called the duodenum. It has a specialized lining that absorbs nutrients from food that has already been broken down by digestive enzymes, which is essential for getting nourishment from what you eat.
AI-generated from the Wikipedia summary — may contain errors.
Key facts
- Anatomy.Name
- Jejunum
- Anatomy.Latin
- jejunum
- Anatomy.Image
- Illu small intestine.jpg
- Anatomy.Caption
- Small intestine
- Anatomy.Image2
- Gray1041.png
- Anatomy.Caption2
- Superior and inferior duodenal fossæ.
- Anatomy.Precursor
- laude
- Anatomy.Artery
- Jejunal arteries
- Anatomy.Vein
- Jejunal veins
- Anatomy.Nerve
- Celiac ganglia, vagus
- Anatomy.PartOf
- Small intestine
- Anatomy.System
- Digestive system
via Wikipedia infobox
Research
49,008 papers- Jejunum: The understudied meeting place of dietary lipids and the microbiota.ReviewBiochimie · 2020Lema I, Araújo JR, Rolhion N et al.DOI: 10.1016/j.biochi.2020.09.007
- The utility of LigaSure for free jejunum transfer.Journal of plastic, reconstructive & aesthetic surgery : JPRAS · 2024Onoda S, Satake T, Katsuragi R et al.DOI: 10.1016/j.bjps.2024.07.007
- Traumatic Spigelian hernia with perforated jejunum.ANZ journal of surgery · 2020Tinney A, Lukies M, Rajasagaram N et al.DOI: 10.1111/ans.15021
- Structure and function of the jejunum in kwashiorkor.ReviewNutrition reviews · 1971DOI: 10.1111/j.1753-4887.1971.tb07304.x
- Jejunum interposition after cervical esophageal resection.ReviewDiseases of the esophagus : official journal of the International Society for Diseases of the Esophagus · 2001Schultz-Coulon HJDOI: 10.1111/j.1442-2050.2001.00144.x
- Jejunum syndrome.Chinese medical journal · 1979Tongzhu X, Wanzhong Z, Shaoxun W et al.
- Second free jejunum transfer after flap loss does not affect oral intake: A retrospective case-control study.Journal of plastic, reconstructive & aesthetic surgery : JPRAS · 2024Oshima A, Wakabayashi M, Ikeno T et al.DOI: 10.1016/j.bjps.2023.10.125
- [Neuroendocrine neoplasms of the distal jejunum and ileum].ReviewDer Pathologe · 2014Anlauf M, Sipos B, Boeck I et al.DOI: 10.1007/s00292-013-1888-5
via PubMed
Wikidata facts
- Image
- Dogjejunum100x.jpg
Show 2 more facts
- NCI Thesaurus ID
- C12388
- Commons category
- Jejunum
Sources (8)
via Wikidata · CC0
~4 min read
Article
8 sectionsContents
- Structure
- Histology
- Function
- Other animals
- History
- Etymology
- References
- External links
The jejunum is the second part of the small intestine in humans and most higher vertebrates, including mammals, reptiles, and birds. Its lining is specialized for the absorption by enterocytes of small nutrient molecules which have been previously digested by enzymes in the duodenum.
The jejunum lies between the duodenum and the ileum and is considered to start at the suspensory muscle of the duodenum, a location called the duodenojejunal flexure. The division between the jejunum and ileum is not anatomically distinct. In adult humans, the small intestine is usually long (post mortem), about two-fifths of which (about ) is the jejunum.