Anatomy

Amnion

The innermost membranous sac that surrounds and protects the developing embryo which is bathed in the AMNIOTIC FLUID. Amnion cells are secretory EPITHELIAL CELLS and contribute to the amniotic fluid.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

The innermost membranous sac that surrounds and protects the developing embryo which is bathed in the AMNIOTIC FLUID. Amnion cells are secretory EPITHELIAL CELLS and contribute to the amniotic fluid.

MeSH Record

Classification

Broader headings

Related Concepts

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MeSH Record

See Also

MeSH Record

Synonyms

5 entry terms
  • Amniotic Membrane
  • Amnions
  • Amniotic Membranes
  • Membrane, Amniotic
  • Membranes, Amniotic

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

not restricted to mammals; intra-amniotic injections = AMNION + INJECTIONS; /surg: consider AMNIOTOMY

MeSH Hierarchy

Tree Numbers

  1. A10w.615w.284w.277w
  2. A16.254.750w.277w

AMA Style

References

  1. National Library of Medicine. Amnion. Medical Subject Headings (MeSH). 2026. Unique ID D000650. http://id.nlm.nih.gov/mesh/2026/D000650
  2. Amnion. In: Wikipedia. https://en.wikipedia.org/wiki/Amnion
  3. Amnion. In: Wikidata. https://www.wikidata.org/wiki/Q473749