Anatomical Heart Ring. The size of your fist & one of your most vital organs, your heart beats 72 times a minute; 100,000 times a day; 3,600,000 times a year; and 2.5 billion times during your lifetime. Treat it well and your heart will create enough energy to take you to the moon and back. Blast off! This realistic heart features lifelike details - from the four chambers to the arteries and veins.