A membranous sac that develops from the posterior part of the alimentary canal in the embryos of mammals, birds, and reptiles, and it is important in the formation of the umbilical cord and placenta in mammals[VHOG]. [ http://en.wikipedia.org/wiki/Allantois VHOG:0000738 ]
Term information
- MESH:A16.254.403.147
- EMAPA_RETIRED:16084
- RETIRED_EHDAA2:0000114
- NCIT:C34101
- VHOG:0000738
- UMLS:C0002084 (ncithesaurus:Allantois)
- BTO:0000474
- SCTID:308825007
- EHDAA2:0001504
- EMAPA:16107
- Wikipedia:Allantois
pheno_slim
A membranous sac that develops from the posterior part of the alimentary canal in the embryos of mammals, birds, and reptiles, and it is important in the formation of the umbilical cord and placenta in mammals[VHOG].
A membranous sac that develops from the posterior part of the alimentary canal in the embryos of mammals, birds, and reptiles, and it is important in the formation of the umbilical cord and placenta in 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]
Term relations
- extraembryonic membrane
- has developmental contribution from some endoderm
- has developmental contribution from some splanchnic layer of lateral plate mesoderm
- develops from some cloaca
- only in taxon some Amniota
- has part some (part of some renal system)