The outermost extraembryonic membrane of amniotes. [ MESH:A10.615.284.473 MP:0002836 https://github.com/geneontology/go-ontology/issues/22603 http://orcid.org/0000-0002-6601-2165 ]
Synonyms: embryonic chorion chorion uterine chorion fetal chorion chorion (vertebrates)
Term information
- GAID:1299
- MESH:D002823
- Wikipedia:Chorion
- BTO:0000252
- EHDAA:150
- EHDAA2:0000245
- EV:0100121
- VHOG:0000200
- EMAPA:16112
- NCIT:C34124
- UMLS:C1516505 (ncithesaurus:Chorionic_Sac)
- EFO:0002780
- CALOHA:TS-0144
- NCIT:C34122
- FMA:80224
- UMLS:C0008503 (ncithesaurus:Chorion)
uberon_slim, efo_slim, pheno_slim, human_reference_atlas
This term refers to the amniote structure. It is distinct from the concept of chorion in insects
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]
Term relations
- extraembryonic membrane
- mesoderm-derived structure
- in taxon some Amniota
- adjacent to some embryo
- has part some chorionic mesenchyme
- develops from some amniotic fold
- has part some chorionic ectoderm