By the end of the eighth week following conception, the embryo looks like a
A) round mass of cells.
B) tiny tube.
C) curved form with an evident heart and buds for limbs.
D) human being.
Correct Answer:
Verified
Q17: The endodermal layer eventually forms
A) the nervous
Q18: The ectodermal cells develop into
A) the heart.
B)
Q19: The mesodermal layer eventually gives rise to
Q20: By the end of the third week,
Q21: Which of the following is correct?
A) The
Q23: The prenatal support system-the amniotic sac, placenta,
Q24: The embryo grows within the _, a
Q25: One function of the amniotic sac is
Q26: The exchange of materials between the fetus
Q27: The placenta serves as a natural filter
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