The amnion of mammalian embryo is derived from
mesoderm and trophoblast
endoderm and mesoderm
ectoderm and mesoderm
ectoderm and endoderm
The extraembryonic or foetal membranes are amnion, chorion, allantois and Yolk sac. Amnion is formed from mesoderm on outer side and ectoderm on inner side. Chorion is formed from trophoectoderm and mesoderm whereas allantois and Yolk sac membrane have mesoderm on outerside and endoderm in inner side.
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