In Which Structure is Oxygen Saturation Lowest

Question

In which structure is oxygen saturation lowest?
A) Right atrium
B) Pulmonary capillaries
C) Pulmonary veins
D) Left ventricle

Accepted Answer

The right atrium receives deoxygenated blood from the body through the superior and inferior vena cavae, making it the location with the lowest oxygen saturation among the options listed.