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Descriptor English: Chorion
Descriptor Spanish: Corion
Descriptor corion
Scope note: Membrana extraembrionaria más externa, que rodea al embrión en desarrollo. En los REPTILES y AVES, se adhiere al cascarón y permite el intercambio de gases entre el huevo y su medio ambiente. En los MAMÍFEROS, el corion evoluciona a la contribución fetal de la PLACENTA.
Descriptor Portuguese: Córion
Descriptor French: Chorion
Entry term(s): Chorions
Tree number(s): A10.615.284.473
A16.254.750.473
RDF Unique Identifier: https://id.nlm.nih.gov/mesh/D002823
Scope note: The outermost extra-embryonic membrane surrounding the developing embryo. In REPTILES and BIRDS, it adheres to the shell and allows exchange of gases between the egg and its environment. In MAMMALS, the chorion evolves into the fetal contribution of the PLACENTA.
Allowable Qualifiers: AB abnormalities
AH anatomy & histology
BS blood supply
CH chemistry
CY cytology
DE drug effects
DG diagnostic imaging
EM embryology
EN enzymology
GD growth & development
IM immunology
IN injuries
IR innervation
ME metabolism
MI microbiology
PA pathology
PH physiology
PP physiopathology
PS parasitology
RE radiation effects
SU surgery
TR transplantation
UL ultrastructure
VI virology
Previous Indexing: Fetal Membranes (1966-1974)
Public MeSH Note: 78; was see under FETAL MEMBRANES 1963-77
Online Note: search FETAL MEMBRANES 1966-74
History Note: 78(75); was see under FETAL MEMBRANES 1963-77
Related: Chorioallantoic Membrane MeSH
DeCS ID: 2873
Unique ID: D002823
NLM Classification: WQ 210
Documents indexed in the Virtual Health Library (VHL): Click here to access the VHL documents
Date Established: 1978/01/01
Date of Entry: 1999/01/01
Revision Date: 2007/07/11
Chorion - Preferred
Concept UI M0004340
Scope note The outermost extra-embryonic membrane surrounding the developing embryo. In REPTILES and BIRDS, it adheres to the shell and allows exchange of gases between the egg and its environment. In MAMMALS, the chorion evolves into the fetal contribution of the PLACENTA.
Preferred term Chorion
Entry term(s) Chorions



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