Maximum oxygen saturation is there in which of the following blood vessels in a fetus?: (A) Ascending aoa, (B) Descending aoa, (C) Inferior vena cava, (D) Ductus venosus
Answer is D. Oxygen saturation of different blood vessels in fetus: Umbilical vein > Ductus venosus > Inferior vena cava > Ascending aoa > Descending Aoa > Umbilical aeries