amnion
Noun
Meaning
A thin membrane surrounding the embryos of mammals, birds, and reptiles.
Source: Webster's dictionarySynonyms
amnios
amniotic sac
maidenhead
caul
membrane
capsule
placenta
hymen
eardrum
neurilemma
amniotic
meninges
afterbirth
meninx
amnio
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Examples
After that, the epiblast and the hypoblast establish contact with the extraembryonic mesoderm until they cover the yolk sac and amnion.
The somatic layer depends on a continuous layer with mesoderm that covers the amnion.