The outermost extraembryonic membrane of amniotes. [ https://github.com/geneontology/go-ontology/issues/22603 MP : 0002836 http://orcid.org/0000-0002-6601-2165 MESH : A10.615.284.473 ]

This is just here as a test because I lose it

Term information

database cross reference
Subsets

uberon_slim, efo_slim, pheno_slim, human_reference_atlas

comment
  • This term refers to the amniote structure. It is distinct from the concept of chorion in insects
definition
  • The outermost extraembryonic membrane of amniotes.
depicted by
  • http://upload.wikimedia.org/wikipedia/commons/5/51/Gray24.png
development notes
  • Extra-embryonic ectoderm
external definition
  • The outer membrane enclosing the embryo in reptiles, birds, and mammals. [TFD][VHOG]
  • 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].
has exact synonym
  • uterine chorion
  • fetal chorion
  • chorion (vertebrates)
  • embryonic chorion
  • chorion
has related synonym
  • chorion frondosum
  • chorionic sac
homology notes
  • Structures homologous to the four extraembryonic membranes of reptiles and birds appear in mammals: amnion, chorion, yolk sac, and allantois.[well established][VHOG]
id
  • UBERON:0003124
present in taxon
  • http://purl.obolibrary.org/obo/NCBITaxon_9606
taxon notes
  • The chorion of placentals is bilaminar as in reptiles and birds, but forms from the trophoblast and includes the ajdacent mesodermal layer [ISBN:0073040584]