Your Heart: An Overview
Your heart is a hollow muscle, made of two pumps side by side. Each pump has two chambers: the atrium and the ventricle. Your heart is responsible for pumping blood (and oxygen and nutrients) to all parts of your body. Once the blood is ready to be re-oxygenated, it moves through your veins back to your heart, and then on to your lungs where it gets re-oxygenated. It also pumps blood from the rest of your body to the lungs, where blood is re-oxygenated. Weighing between 8 to 10 ounces, this miraculous organ beats about 100,000 times and pumps 1,980 galons of blood through your body every day. This process runs continuously every minute of your life. Amazingly, the system of blood vessels moves your blood over 60,000 miles of arteries, veins, and capillaries, yet it only takes about 20 seconds for your blood to travel the entire vascular system!