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Descriptor English:

Chorion

Descriptor Spanish:

Corion

Spanish from Spain

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):

Membrane chorionique

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 malformations
AH anatomie et histologie
BS vascularisation
CH composition chimique
CY cytologie
DE effets des médicaments et des substances chimiques
DG imagerie diagnostique
EM embryologie
EN enzymologie
GD croissance et développement
IM immunologie
IN traumatismes
IR innervation
ME métabolisme
MI microbiologie
PA anatomopathologie
PH physiologie
PP physiopathologie
PS parasitologie
RE effets des radiations
SU chirurgie
TR transplantation
UL ultrastructure
VI virologie