What Structure is Not Perfused as Blood Flows from the Venae

Question

What structure is not perfused as blood flows from the venae cavae to the pulmonary veins?
A) Right ventricle
B) Left anterior descending artery
C) Pulmonary artery
D) Pulmonary capillaries

Accepted Answer

The left anterior descending artery is not perfused during the flow from the venae cavae to the pulmonary veins because it is a branch of the left coronary artery, which arises from the aorta. The right ventricle, pulmonary artery, and pulmonary capillaries are all perfused as blood flows through the pulmonary circulation.