The amnion is to the amniotic fluid as the allantois is to the
A) blood cell precursors.
B) chorionic villi.
C) umbilical blood vessels.
D) amniotic cavity.
E) yolk.
Correct Answer:
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Q22: What structure produces progesterone and estrogen during
Q23: The _ is the first embryonic membrane
Q24: The first system in the body to
Q25: The blood of the mother and the
Q26: The yolk sac of the chick provides
Q28: Which of the following would be considered
Q29: Most birth defects are due to the
Q30: When cells begin to move in the
Q31: The umbilical arteries carry
A) oxygen-rich blood to
Q32: Fetal development includes the third through ninth
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