In Which Structure is the Oxygen Saturation Highest

Question

In which structure is the oxygen saturation highest?
A) Pulmonary veins
B) Venae cavae
C) Right ventricle
D) Pulmonary artery

Accepted Answer

Oxygenated blood from the lungs enters the left atrium via the pulmonary veins, which then flows into the left ventricle and is pumped out into the systemic circulation. Therefore, the oxygen saturation is highest in the pulmonary veins.