Anatomy

Extraembryonic Membranes

The thin layers of tissue that surround the developing embryo. There are four extra-embryonic membranes commonly found in VERTEBRATES, such as REPTILES; BIRDS; and MAMMALS. They are the YOLK SAC, the ALLANTOIS, the AMNION, and the CHORION. These membranes provide protection and means to transport nutrients and wastes.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

The thin layers of tissue that surround the developing embryo. There are four extra-embryonic membranes commonly found in VERTEBRATES, such as REPTILES; BIRDS; and MAMMALS. They are the YOLK SAC, the ALLANTOIS, the AMNION, and the CHORION. These membranes provide protection and means to transport nutrients and wastes.

MeSH Record

Classification

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MeSH Record

Synonyms

12 entry terms
  • Extra-Embryonic Membranes
  • Extra Embryonic Membranes
  • Extra-Embryonic Membrane
  • Extraembryonic Membrane
  • Membrane, Extra-Embryonic
  • Membrane, Extraembryonic
  • Membranes, Extra-Embryonic
  • Membranes, Extraembryonic
  • Fetal Membranes
  • Fetal Membrane
  • Membrane, Fetal
  • Membranes, Fetal

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

induced rupture = LABOR, INDUCED; premature rupture = Premature Rupture of Fetal Membranes; rupture in normal labor = EXTRAEMBRYONIC MEMBRANES (IM) + LABOR, OBSTETRIC (IM)

MeSH Hierarchy

Tree Numbers

MeSH Record

NLM Classification

QS 645

AMA Style

References

  1. National Library of Medicine. Extraembryonic Membranes. Medical Subject Headings (MeSH). 2026. Unique ID D005321. http://id.nlm.nih.gov/mesh/2026/D005321
  2. Extraembryonic Membranes. In: Wikipedia. https://en.wikipedia.org/wiki/Extraembryonic_tissue
  3. Extraembryonic Membranes. In: Wikidata. https://www.wikidata.org/wiki/Q30674142