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.
Why must the heart contract very strongly to pump blood from the left ventricle into the aorta? What is the order in which the heart pumps blood? Right Atrium, right ventricle, lungs, left atrium, left ventricle, then it goes all over the body, comes back to the heart and repeats the process.     For the heart tâ¦o function properly, the four chambers must beat in an organized manner. The four heart chambers fill with and pump blood.