Which is the correct order in which blood flows past valves in the human heart, starting with low-oxygen blood returning from the body and entering the heart.
A) Left atrioventricular valve, pulmonary valve, right atrioventricular valve, aortic valve
B) Right atrioventricular valve, aortic valve, left atrioventricular valve, pulmonary valve
C) Right atrioventricular valve, pulmonary valve, left atrioventricular valve, aortic valve
D) Pulmonary valve, right atrioventricular valve, aortic valve, left atrioventricular valve
E) Aortic valve, left atrioventricular valve, pulmonary valve; right atrioventricular valve

Question

Quizplus · Accepted Answer

The correct order of blood flow past valves in the heart starting with low-oxygen blood entering the heart from the body is: Right atrioventricular valve, pulmonary valve, left atrioventricular valve, aortic valve. This is because the blood enters the right atrium, passes through the tricuspid (right atrioventricular) valve into the right ventricle, then through the pulmonary valve to the lungs for oxygenation. The oxygen-rich blood then returns to the heart, entering the left atrium, passing through the mitral (left atrioventricular) valve into the left ventricle, and then being pumped out through the aortic valve to the rest of the body.

Which Is the Correct Order in Which Blood Flows Past