Open Sesame Science
Exploration Center

:::The heart throbs to maintain the blood circulation around the body. The rhythmic beats formed by the diastole and systole of the heart are called heartbeats. Heartbeats are inaudible. But you can hear the sound that the cardiac valves close, which is known as the heart sound.

The heart throbs to maintain the blood circulation around the body. The rhythmic beats formed by the diastole and systole of the heart are called heartbeats. Heartbeats are inaudible. But you can hear the sound that the cardiac valves close, which is known as the heart sound.