heartbeat - macaron
$800.00
The “lub” is the sound of these valves closing. ff advance server login After your ventricles contract to pump blood away from the heart, the aortic and pulmonary valves close and make the “dub” sound. pengertian atletik Your Heartbeat Your heart beats an average of 60 to 100 beats per minute In that one minute, your heart pumps about five quarts of blood through your arteries