At a resting pulse rate of 75 beats per minute, the human heart typically pumps about 65 ml of blood per beat. Blood has a density of 1060 kg/m^3. Circulating all of the blood in the body through the heart takes about 1 minute for a person at rest.
1.) Explain how much blood is in the body?
2.) On average, define what mass of blood does the heart pump with each heart beat?