The yolk sac __________.
A) forms during the third trimester of pregnancy
B) is the outer ring of cells that surrounds the blastocyst
C) produces blood cells until the organs are mature enough to take over this function
D) contains one large vein that delivers blood loaded with nutrients and two arteries that remove waste
Correct Answer:
Verified
Q5: The embryonic disk _.
A) becomes the new
Q6: An ovum bursts from one of a
Q7: The most rapid prenatal changes take place
Q8: The placenta _.
A) forms in the second
Q9: The force of blood flowing through the
Q11: The amniotic fluid _.
A) delivers food and
Q12: The corpus luteum _.
A) is where fertilization
Q13: The germinal period _.
A) occurs during the
Q13: The male produces sperm in the _,
Q15: By the end of Greta's first month
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