Anatomy

Jejunum

The middle portion of the SMALL INTESTINE, between DUODENUM and ILEUM. It represents about 2/5 of the remaining portion of the small intestine below duodenum.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

The middle portion of the SMALL INTESTINE, between DUODENUM and ILEUM. It represents about 2/5 of the remaining portion of the small intestine below duodenum.

MeSH Record

Classification

Broader headings

Related Concepts

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MeSH Record

See Also

MeSH Record

Synonyms

1 entry terms
  • Jejunums

MeSH Record

Aspects Covered

24 allowable subheadings

Indexed with the subheadings abnormalities, anatomy & histology, blood supply, chemistry, cytology, diagnostic imaging, drug effects, embryology, enzymology, growth & development, immunology, injuries, innervation, metabolism, microbiology, parasitology, pathology, physiology, physiopathology, radiation effects, surgery, transplantation, ultrastructure, virology.

MeSH Record

Indexing Annotation

inflammation or jejunitis = JEJUNAL DISEASES (IM) + ENTERITIS (IM); jejuno-ileal bypass or shunt or jejuno-ileostomy in obesity: index under JEJUNOILEAL BYPASS (note XR ref)

MeSH Hierarchy

Tree Numbers

  1. A03w.556w.124w.684w.500w
  2. A03w.556w.249w.750w

MeSH Record

NLM Classification

WI 510

AMA Style

References

  1. National Library of Medicine. Jejunum. Medical Subject Headings (MeSH). 2026. Unique ID D007583. http://id.nlm.nih.gov/mesh/2026/D007583
  2. Jejunum. In: Wikipedia. https://en.wikipedia.org/wiki/Jejunum
  3. Jejunum. In: Wikidata. https://www.wikidata.org/wiki/Q185765