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 ]

This is just here as a test because I lose it

Term information

Subsets

pheno_slim

definition
  • 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].
depicted by
  • http://upload.wikimedia.org/wikipedia/commons/a/a5/Gray25.png
development notes
  • a diverticulum of the hindgut endoderm [ISBN:0073040584 (Vertebrates, Kardong)]
external definition
  • 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]
external ontology notes
  • part_of embryo in EHDAA2 - note differences in humans
has related synonym
  • allantoic bud
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:0004340