. 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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