NIH MeSH · D000650Anatomy
Amnion
Also known asAmnions · Amniotic Membrane · Amniotic Membranes · Membrane, Amniotic · Membranes, Amniotic
Definition
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 classification
- A10.615.284.277
- A16.254.750.277
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Common questions about Amnion
What does Amnion mean in medicine?
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. This definition is taken from the National Library of Medicine's MeSH (Medical Subject Headings) 2026 release, which is the standard vocabulary used to index PubMed and most medical literature.
Is Amnion known by any other names?
Yes. Amnion is also referred to as Amnions, Amniotic Membrane, Amniotic Membranes, Membrane, Amniotic in different clinical, research and patient-facing contexts. The MeSH descriptor groups all of these synonyms under a single canonical concept so research and records stay consistent.
Where does Amnion sit in the medical classification?
Amnion falls under the broader medical category "Anatomy" in the MeSH hierarchy (tree numbers: A10.615.284.277, A16.254.750.277). Browsing the related concepts on this page takes you to neighbouring topics in the same branch of medicine.
Where can I get a plain-language explanation of Amnion?
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Source: NIH MeSH 2026 (D000650) — National Library of Medicine, public domain. View official MeSH record ↗