In humans, the yolk sac .
A) is no longer a useful structure
B) forms the human urinary bladder
C) passes nutrients to the embryo after digesting the yolk mass
D) is the site of origin for blood cells and primordial germ cells
Correct Answer:
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Q12: In the human, this germ cell layer
Q13: The placenta is formed by .
A) maternal
Q14: This portion of the blastocyst forms the
Q15: The three primary germ layers develop during
Q16: All exchanges between mother and embryo occur
Q18: The decidua basalis and decidua capsularis are
Q19: The is the final product of cleavage.
A)
Q20: During the process of implantation, the inner
Q21: What is true of the structure of
Q22: In humans, this primary germ layer gives
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