Question

types of placenta in mammals​

Answer 1

Answer:

6 types of placenta are there in mammals

Answer 2

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✎ Placental Classifications.

Mammalian placentas are classified into two types according to the fetal membrane including to chorion, yolk sac placenta (choriovitelline placenta) and chorioallantoic placenta.

The placenta passes oxygen, nutrients, and other useful substances from the mother to the fetus. It also passes carbon dioxide and other wastes from the fetus to the mother. The placenta lets blood from the fetus and mother exchange substances without actually mixing.

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