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. [ http://www.informatics.jax.org/accession/csmith MP:0005029 ]
Synonyms: amnios
Term information
- VHOG:0000721
- FMA:80223
- GAID:1298
- UMLS:C0002630 (ncithesaurus:Amnion)
- MESH:D000650
- EV:0100122
- NCIT:C12365
- EHDAA:136
- CALOHA:TS-0033
- EMAPA:16109
- BTO:0000065
- SCTID:181457005
- EHDAA2:0000116
- Wikipedia:Amnion
pheno_slim, human_reference_atlas
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
- protein-containing material entity
- cellular anatomical structure
- mesoderm-derived structure
- has part some amniotic mesoderm
- has part some amniotic ectoderm
- has developmental contribution from some somatic layer of lateral plate mesoderm
- only in taxon some Amniota
- surrounds some embryo
- develops from some amniotic fold
- has developmental contribution from some ectoderm