In Which Fetal Blood Vessel is Oxygen Concentration Greatest

Question

In which fetal blood vessel is oxygen concentration greatest?
A) Aorta
B) Umbilical vein
C) Umbilical arteries
D) Left ventricle

Accepted Answer

The umbilical vein carries oxygen-rich blood from the placenta to the fetus, making the oxygen concentration greatest in this vessel. The other options either carry deoxygenated blood (umbilical arteries, aorta) or are not blood vessels (left ventricle).