The placenta is a site of diffusion and transport of waste, oxygen, and nutrients between fetal and maternal blood. It acts as a barrier between the maternal and fetal blood, allowing for exchange of necessary substances while preventing the transfer of harmful substances such as bacteria and viruses. Maternal blood does not enter the fetal circulation, nor is the placenta formed from maternal circulatory stem cells.

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The Placenta Is

Question 47

Multiple Choice

The placenta is

A) a site where maternal blood enters the fetal circulation.
B) a site formed by the proliferation of the maternal endometrium and myometrium.
C) a site where fetal blood can enter the maternal circulation.
D) a site of diffusion and transport of wastes,oxygen,and nutrients between fetal and maternal blood.
E) formed from maternal circulatory stem cells,and serves as an exchange organ between mother and fetus.

Correct Answer: