A few days after fertilization, the blastula travels down the fallopian tubes and into the uterus where it implants. Throughout this entire trip, cells are continuously dividing. Eventually, organs begin to form and develop. Energy is needed for all of these changes to occur. Which part of the reproductive system provides nutrients to the growing fetus?
A:Placenta
B:Ovary
C:Uterus
D: amniotic Sac
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