PATHOLOGY

Detailed explanation-1: -The human heart beats about 72 times in a minute. Therefore, frequency of our heart beat is 72/60 or 1.2 Hz. This frequency is much less than the audible range. It is a blessing in disguise that we cannot hear sound produced by the heart, movement of muscles and body organs.

Detailed explanation-2: -The walls of the muscular heart contract and relax rhythmically and this rhythmic contraction and relaxation of the heart constitutes the heartbeat. One heartbeat is responsible for generating one pulse of the arteries. A normal heart beats about 72 times in a minute, on an average.

Detailed explanation-3: -Thus, our heart beats 103680 times a day.

Detailed explanation-4: -Frequency means number of events in a given time period. Hence frequency of heart beat is 72 per minute. In SI unit it is 72/60=1. 2 per second.