What is the role of the heart?

Your heart is a pumping muscle responsible for circulating oxygen-rich blood throughout your body. There are four chambers inside your heart: the two upper chambers are called atria and the two lower chambers are called ventricles. The heart muscle squeezes blood from chamber to chamber. read more

The main function of the heart is to pump blood to the lungs to be saturated with oxygen, and then pump it out into the body to supply the cells with oxygen. The heart, along with the blood vessels, make up the cardiovascular system. read more