How does the Human Heart Work to Pump Blood Around the Body?

The human heart is a remarkable organ responsible for pumping oxygen-rich blood to the entire body. It consists of four chambers – the left and right atria, and the left and right ventricles. As the heart beats, the atria receive blood from the body and the lungs, and then contract to push the blood into the ventricles. The ventricles then contract to pump the blood out to the body and lungs. This coordinated pumping action ensures that oxygen is delivered to every cell in the body, allowing for proper functioning and overall health.