The pulmonary circuit ____.

A) involves the hepatic portal vein
B) moves oxygen-rich blood to the kidneys
C) includes the coronary arteries
D) leads to, through, and from the lungs
E) receives blood from the left ventricle

The pulmonary circuit is responsible for moving blood to, through, and from the lungs. It is a loop that begins at the right ventricle of the heart, where it receives deoxygenated blood, and ends at the left atrium, where oxygenated blood is returned to the heart to be pumped out to the rest of the body. The hepatic portal vein is part of the systemic circuit, which deals with blood flow to the rest of the body. The kidneys receive blood from the renal arteries, not the pulmonary circuit. The coronary arteries supply blood to the heart muscle itself, and are not part of either circuit. Oxygen-rich blood is moved away from the lungs by the pulmonary circuit, it does not move towards them.