Structured Summary
Abstract
A post-MORULA preimplantation mammalian embryo that develops from a 32-cell stage into a fluid-filled hollow ball of over a hundred cells. A blastocyst has two distinctive tissues. The outer layer of trophoblasts gives rise to extra-embryonic tissues. The inner cell mass gives rise to the embryonic disc and eventual embryo proper.
MeSH Record
Classification
Broader headings
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Related Concepts
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MeSH Record
Synonyms
5 entry terms
- Embryo, Preimplantation
- Blastocysts
- Embryos, Preimplantation
- Preimplantation Embryo
- Preimplantation Embryos
MeSH Record
Aspects Covered
14 allowable subheadings
Indexed with the subheadings chemistry, classification, cytology, drug effects, enzymology, immunology, metabolism, microbiology, parasitology, pathology, physiology, radiation effects, ultrastructure, virology.
MeSH Record
Indexing Annotation
Mammalian only; non-mammalian, use BLASTULA; /transpl: coordinate BLASTOCYST (NIM with no qualifiers) + EMBRYO TRANSFER (IM); do not confuse with BLASTOCYTES see BLASTOMERES
MeSH Record
History Note
74
MeSH Hierarchy
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MeSH Record
NLM Classification
QS 645
AMA Style
References
- National Library of Medicine. Blastocyst. Medical Subject Headings (MeSH). 2026. Unique ID D001755. http://id.nlm.nih.gov/mesh/2026/D001755
- Blastocyst. In: Wikipedia. https://en.wikipedia.org/wiki/Blastocyst
- Blastocyst. In: Wikidata. https://www.wikidata.org/wiki/Q227717