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Descriptor English: Blastocyst
Descriptor Spanish: Blastocisto
Descriptor blastocisto
Entry term(s) embrión preimplantación
Scope note: Embrión de los mamíferos en la etapa posterior a la de MÓRULA y antes de producirse su implantación; comprende desde el estadio de 32 células al de formación de una estructura redondeada, rellena de líquido de más de cien células. El blastocisto consta de dos tejidos diferentes. La capa externa de trofoblastos da lugar a los tejidos extraembronarios. La capa de células internas da lugar al disco embrionario y finalmente al propio embrión.
Descriptor Portuguese: Blastocisto
Descriptor French: Blastocyste
Entry term(s): Blastocysts
Embryo, Preimplantation
Embryos, Preimplantation
Preimplantation Embryo
Preimplantation Embryos
Tree number(s): A16.254.500
RDF Unique Identifier: https://id.nlm.nih.gov/mesh/D001755
Scope note: 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.
Annotation: Mammalian only; non-mammalian, use BLASTULA; /transpl: coordinate BLASTOCYST (NIM with no qualifiers) + EMBRYO TRANSFER (IM); do not confuse with BLASTOCYTES see BLASTOMERES
Allowable Qualifiers: CH chemistry
CL classification
CY cytology
DE drug effects
EN enzymology
IM immunology
ME metabolism
MI microbiology
PA pathology
PH physiology
PS parasitology
RE radiation effects
UL ultrastructure
VI virology
Entry Combination: transplantation:Embryo Transfer
Public MeSH Note: 74
History Note: 74
DeCS ID: 1779
Unique ID: D001755
NLM Classification: QS 645
Documents indexed in the Virtual Health Library (VHL): Click here to access the VHL documents
Date Established: 1974/01/01
Date of Entry: 1999/01/01
Revision Date: 2007/07/09
Blastocyst - Preferred
Concept UI M0002641
Scope note 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.
Preferred term Blastocyst
Entry term(s) Blastocysts
Embryo, Preimplantation
Embryos, Preimplantation
Preimplantation Embryo
Preimplantation Embryos



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