Placental Exchange And Fetal Circulation
Which of the following statements regarding placental exchange is true?
A
Nutrients diffuse from maternal blood in the umbilical cord, through trophoblasts in the chorionic villi, and into the fetal bloodstream.
B
Maternal blood is supplied directly to the fetus through the umbilical cord.
C
Oxygen diffuses from maternal blood in the intervillous space, through trophoblasts in the chorionic villi, and into the fetal bloodstream.
D
Waste products from the fetus diffuse out of capillaries in the chorionic villi and into the umbilical vein, which carries them to the maternal circulation for elimination.
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