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  4. The extra embryonic membranes of mammalian embryo are derived from

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Q. The extra embryonic membranes of mammalian embryo are derived from

Uttarkhand PMTUttarkhand PMT 2008

Solution:

Extra embryonic membranes of mammalian embryo or foetal membranes are derived from trophoblast (an epithelium surrounding the mammalian blastocysts). These membranes are yolk sac, amnion, chorion and allantois. They helps in respiration, nutrition, excretion and protection.