Individuals who want to donate whole blood or apheresis must be : At least 16 years old (donors under the age of 17 may only donate whole blood, and must have a signed parental/guardian consent form). At least 19 years old and weigh a minimum of 110 pounds.
Your heart handles blood in much the same way. The heart pumps about 2,000 gallons (7,571 liters) of blood a day through its chambers. Of Â­course, we're not big enough to hold that much liquid, so it just pumps the same blood over and over, and it doesn't benefit from a drop of it. At least, not initially.
1 An average heart pumps about 2.4 ounces (70 milliliters) of blood per beat of heart. 2  If 72 beats occur per minute, then about 1.3 gallons (5 Liters) of blood is pumped per minute. 3  About 1,900 gallons (7,200 Liters) of blood is pumped per day.