Which of the following statements is true of a placenta?
A) It is an organ that helps in the exchange of nutrients and oxygen wastes between the mother and fetus.
B) It is a muscular organ within which the infant develops before birth.
C) It is a sac present within the uterus in which the fetus floats.
D) It unites with a sperm to produce a zygote.
E) It is the stage of human gestation from eight weeks after conception until the birth of an infant.
Correct Answer:
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