Anatomy

Small Intestine

The portion of the GASTROINTESTINAL TRACT between the PYLORUS of the STOMACH and the ILEOCECAL VALVE of the LARGE INTESTINE. It is divisible into three portions: the DUODENUM, the JEJUNUM, and the ILEUM.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

The portion of the GASTROINTESTINAL TRACT between the PYLORUS of the STOMACH and the ILEOCECAL VALVE of the LARGE INTESTINE. It is divisible into three portions: the DUODENUM, the JEJUNUM, and the ILEUM.

MeSH Record

Classification

Broader headings

Narrower headings

Related Concepts

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MeSH Record

Synonyms

3 entry terms
  • Intestine, Small
  • Intestines, Small
  • Small Intestines

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

general or unspecified; prefer specifics; inflammation equals ENTERITIS but ENTEROCOLITIS; DUODENITIS; and ILEITIS are available

MeSH Record

History Note

INTESTINAL MICROORGANISMS was heading 1963-67

MeSH Hierarchy

Tree Number

  1. A03w.556w.124w.684w

AMA Style

References

  1. National Library of Medicine. Small Intestine. Medical Subject Headings (MeSH). 2026. Unique ID D007421. http://id.nlm.nih.gov/mesh/2026/D007421
  2. Small Intestine. In: Wikipedia. https://en.wikipedia.org/wiki/Small_intestine
  3. Small Intestine. In: Wikidata. https://www.wikidata.org/wiki/Q11090