The first system in the body to become visibly differentiated during development is the
A) digestive system.
B) cardiovascular system.
C) respiratory system.
D) nervous system.
E) reproductive system.
Correct Answer:
Verified
Q19: When does the heart begin to develop?
A)
Q20: Which of these is associated with pre-embryonic
Q21: The white,greasy,cheeselike substance that covers the fetus's
Q22: What structure produces progesterone and estrogen during
Q23: The _ is the first embryonic membrane
Q25: The blood of the mother and the
Q26: The yolk sac of the chick provides
Q27: The amnion is to the amniotic fluid
Q28: Which of the following would be considered
Q29: Most birth defects are due to the
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