Terminology Service for NFDI4Health
chorion
Go to external page
http://purl.obolibrary.org/obo/UBERON_0003124
the outermost extraembryonic membrane [ ]
Term info
Label
chorion
Synonyms
- chorion (vertebrates)
- embryonic chorion
- fetal chorion
- uterine chorion
Subsets
uberon_slim, efo_slim, pheno_slim
depicted by
http://upload.wikimedia.org/wikipedia/commons/5/51/Gray24.png
development notes
Extra-embryonic ectoderm
external definition
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]
has obo namespace
uberon
has related synonym
chorionic sac, chorion frondosum
has relational adjective
chorionic
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
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]
Term relations
Subclass of:
- extraembryonic membrane
- mesoderm-derived structure
- has part some chorionic mesenchyme
- develops_from some amniotic fold
- has part some chorionic ectoderm
- adjacent_to some embryo