The thin innermost layer of the extraembryonic membranes that contains the amniotic fluid; the membrane forms a closed sac in which the embryo and later, the fetus, is suspended and protected. [ MP:0005029 http://www.informatics.jax.org/accession/csmith ]
Synonyms: amnios
Term information
- VHOG:0000721
- FMA:80223
- NCIT:C12365
- Wikipedia:Amnion
- EV:0100122
- UMLS:C0002630 (ncithesaurus:Amnion)
- BTO:0000065
- CALOHA:TS-0033
- MESH:D000650
- EHDAA2:0000116
- GAID:1298
- EHDAA:136
- EMAPA:16109
- SCTID:181457005
pheno_slim, human_reference_atlas
https://cdn.humanatlas.io/digital-objects/ref-organ/placenta-full-term-female/v1.1/assets/3d-vh-f-placenta-full-term.glb
http://upload.wikimedia.org/wikipedia/commons/e/e7/Gray14.png
A thin but tough extraembryonic membrane of reptiles, birds and mammals that lines the chorion and contains the fEtus and the amniotic fluid around it. [Biology_Online][VHOG]
Structures homologous to the four extraembryonic membranes of reptiles and birds appear in mammals: amnion, chorion, yolk sac, and allantois.[well established][VHOG]
Term relations
- extraembryonic membrane
- mesoderm-derived structure
- in taxon some Amniota
- has part some amniotic mesoderm
- has part some amniotic ectoderm
- has developmental contribution from some somatic layer of lateral plate mesoderm
- surrounds some embryo
- develops from some amniotic fold
- has developmental contribution from some ectoderm