The heart is mostly made up of a strong muscle tissue called the myocardium and it works continuously like a tireless pump, quietly day and night, throughout a man’s lifetime. It beats about 72 times a minute, and if we calculate the number of minutes in our lifetime, it amounts to about 2,500,000,000 beats in a person’s lifespan of 70 million liters of blood in a lifetime.
During physical exercise and mental stress, this function can increase up to 6 fold or even more. Thus, making the heart the most efficient pump known to mankind. In spite of all the advances made in the fields of science and medical technology, nobody has been able to artificially replicate such a pump.