Which Structure is Not Perfused by Blood That Flows from the Pulmonary

Question

Which structure is not perfused by blood that flows from the pulmonary capillaries to the aorta?
A) Right atrium
B) Aortic semilunar valve
C) Mitral valve
D) Pulmonary veins

Accepted Answer

The right atrium receives blood from the systemic circulation via the superior and inferior vena cavae, not from the pulmonary capillaries. Blood flows from the pulmonary capillaries through the pulmonary veins into the left atrium, then through the mitral valve into the left ventricle, and out through the aortic valve (aortic semilunar valve) into the aorta to supply the body.