How your heart works - Cardiac Cycle ()

Visit for more videos for your class! Have you heard your heart beat? What is the sound like? Yes, it sounds like 'lubb-dubb', 'lubb-dubb'! This sound is produced when the heart produces a pressure when it beats. Now, what causes the beating of the heart? The sequence of events that take place during a single heart beat is known as the Cardiac Cycle. It is not so simple. It is a complex process which involves a sequence of activities and that too within 0.8 sec. The cardiac