In human development, what is the site of early blood cell formation for the fetus?
A) umbilical cord
B) placenta
C) amniotic fluid
D) yolk sac
E) allantois
Correct Answer:
Verified
Q16: Morphogenesis is
A) the total life cycle of
Q17: The last tissue layer to be formed
Q18: The cardiovascular and urinary systems form from
Q19: During the formation of an embryo, a
Q20: A fertilized egg undergoes cell division without
Q22: A pregnancy test is sensitive to which
Q23: Which part of the blastocyst will develop
Q24: Implantation occurs during the
A) fertilization.
B) first week.
C)
Q25: Which of the following structures is responsible
Q26: The allantois
A) becomes the umbilical blood vessels
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