The heart is the most important organ for human longevity. It is the heart muscle that works non-stop even when people sleep. The time when the heart muscles are resting is the time when a person dies. Due to the force of the heart’s muscles, blood reaches the whole human body, and when the heart muscles contract again, the old blood from all over the human body returns to the heart again. The blood is purified by the air inhaled from the lungs (breathing) and becomes new blood. The distribution of that new blood to the body is made by the heart muscle non-stop, from 70 times to more than 100 times per minute.