Which of the following steps must occur first during the embryonic period?
A) organogenesis
B) formation of the primitive streak
C) gastrulation
D) embryonic folding
Correct Answer:
Verified
Q31: The rearrangement and migration of the cells
Q32: What connects the placenta to the fetus?
A)chorion
B)notochord
C)umbilical
Q33: What is the first major event of
Q34: During which process is exposure to teratogens
Q35: Which germ layer forms the gonads and
Q37: Which of the following is the inner
Q38: What contributes to the fetal portion of
Q39: What does the ectoderm form?
A)internal epithelial layer
Q40: Which of the following does NOT occur
Q41: Which cardiovascular changes are NOT typically expected
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