The ___________ provides a two-way exchange of nutrients and waste materials between the mother and the fetus.
A) blastocyst
B) chorionic villi
C) embryo
D) placenta
Correct Answer:
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Q21: Cell differentiation and subsequent fetal development are
Q29: The greatest degree of physical stress associated
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Q32: The blastocyst becomes an embryo about _
Q33: Braxton Hicks contractions and lightening occur during
A)the
Q47: The outer shell of the conglomerate of
Q51: The conglomerate of cells that implants in
Q53: Which of the following statements best describes
Q54: The stage of prenatal development characterized by
Q57: What percentage of women will experience symptoms
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