The heart and lungs work together to get oxygen to the tissues. The heart pumps the blood, and the lungs put oxygen into it. This oxygen-rich blood then circulates throughout the body to nourish the cells; oxygen-depleted blood gets collected from the tissues to be oxygenated in the lungs.
heart pumps blood to make our organs function, including your lungs, Lungs was the one whose responsible in supplying oxygen and carbon dioxide that your body organs needs, including your heart.
