. Umbilical cord in mammals contain-
A. Allantoic arteries and veins
B. Umblicus
C. Placenta
D. None of the above
Best Answer
A. In placental mammals, the umbilical cord is a tube that connects a developing embryo or fetus to the placentA. It normally contains three vessels, two arteries (Umbilical artery) and one vein (Umbilical vein), for the exchange of nutrient- and oxygen-rich blood between the embryo and placentA.
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