In humans, the yolk sac_________ .
A) forms the human urinary bladder
B) is the site of origin for blood cells and primordial germ cells
C) is no longer a useful structure
D) passes nutrients to the embryo after digesting the yolk mass
Correct Answer:
Verified
Q1: This structure surrounds the early embryo and
Q14: The_ is the final product of cleavage.
A)trophoblast
B)blastocyst
C)gastrula
D)zygote
Q15: What organs appear very early in development?
A)brain
Q16: The three primary germ layers develop during
Q17: The human blastocyst consists of two populations
Q18: This portion of the blastocyst forms the
Q19: During the process of implantation, the inner
Q20: In what region of the uterus does
Q21: All exchanges between mother and embryo occur_
Q22: In the human, this germ cell layer
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