The foetal membrane which is the source of first blood corpuscle to enter the circulation of the embryo is called
Amnion
Chorion
Trophoblast
Yolk sac
It's Obvious
The sperm produces substances of enzymatic nature called sperm lysin. In mammals, it is called
Structure connecting the foetus to placenta is
Sertoli cells are
When a foetus develops limbs and digits?
Cleavage is a unique form of mitotic cell division in which
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