Question

Which one of the following statements is correct about placenta?

A

Placenta is permeable to all bacteria.

B

Oxygen and carbon dioxide cannot diffuse through the placenta.

C

Waste products diffuse out of placenta into maternal blood.

D

Placenta does not secrete human chorionic gonadotropins.

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Solution
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Correct option is C)

Placenta is an organ that develops during pregnancy. It is attached to the wall of uterus. It provides oxygen and nutrients to foetus and removes carbon dioxide and other waste produces from foetus' blood into maternal blood. It is attached to foetus via umbilical cord. It protects foetus from all bacteria as it is impermeable to bacteria. It also secretes human chorionic gonadotropin hormone.
Thus, the correct answer is option C.

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