From the Texas Heart Institute’s website, we learn the following about our human heart. It weighs between 7 and 15 ounces (16 ounces is one pound.)It is the size of our fist (Make a fist.) For a person who lives a long life it will beat up to 3.5 billion times. It pumps about 2,000 gallons of blood daily. (Now let’s see, gas is around $2.60/gallon and so 2,000 gallons at $2.60/gallon would be $5,200.00/day!)