The heart is part of your body’s circulatory system. It’s made up of the atria, ventricles, valves, and various arteries and veins. The main function of your heart is to keep blood that’s full of oxygen circulating throughout your body.
The heart is located under the rib cage, to the left of the breastbone (sternum) and between the lungs. Your heart is an amazing organ. Shaped like an upside-down pear, this fist-sized powerhouse pumps five or six quarts of blood each minute to all parts of your body.Apr 29, 2019
As the heart muscle contracts and relaxes, the valves open and shut, letting blood flow through. These bring blood to the lungs, where oxygen enters the bloodstream, and then to the body. This serves as a natural pacemaker and stimulates contraction of the heart muscle.Feb 4, 2019