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Which of the following occurs in the placenta?A) Eroding blood vessels in the endometrium bathe chorionic villi in pools of maternal blood.B) Fetal blood and maternal blood mix.C) All substances in maternal blood that may be harmful to the fetus are prevented from moving across the walls of the villi.D) The amnion and the chorion grow into the endometrium.E) Hormones are absorbed to prevent them from influencing the developing fetus.

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