The outermost extraembryonic membrane of amniotes. [ MESH:A10.615.284.473 https://github.com/geneontology/go-ontology/issues/22603 http://orcid.org/0000-0002-6601-2165 MP:0002836 ]
Synonyms: embryonic chorion chorion uterine chorion fetal chorion chorion (vertebrates)
Term information
- MESH:D002823
- CALOHA:TS-0144
- EHDAA:150
- BTO:0000252
- VHOG:0000200
- EHDAA2:0000245
- FMA:80224
- UMLS:C0008503 (ncithesaurus:Chorion)
- Wikipedia:Chorion
- NCIT:C34122
- NCIT:C34124
- EV:0100121
- EFO:0002780
- EMAPA:16112
- GAID:1299
- UMLS:C1516505 (ncithesaurus:Chorionic_Sac)
uberon_slim, efo_slim, pheno_slim, human_reference_atlas
The outer membrane of the two membranes enclosing the embryo in reptiles, birds, and mammals. In placental mammals it contributes to the development of the placenta[BTO:0000252].
The outer membrane enclosing the embryo in reptiles, birds, and mammals. [TFD][VHOG]
Structures homologous to the four extraembryonic membranes of reptiles and birds appear in mammals: amnion, chorion, yolk sac, and allantois.[well established][VHOG]
The chorion of placentals is bilaminar as in reptiles and birds, but forms from the trophoblast and includes the ajdacent mesodermal layer [ISBN:0073040584]
This term refers to the amniote structure. It is distinct from the concept of chorion in insects
Term relations
- extraembryonic membrane
- cellular anatomical structure
- has part some chorionic mesenchyme
- adjacent to some embryo
- only in taxon some Amniota
- develops from some amniotic fold
- has part some chorionic ectoderm