1)Heart is a vital organ of the body . It pumps the blood through the body and helps in circulation of blood. 2) Breathing is the part of the process respiration in which air is inhaled and exhaled by the body through nose stills .3)Air comes in lungs through trachea . Air comes in lungs and go to the heart through pulmonary vein and return back from heart by pulmonary artery. It is basically a pump of air which sperate O2 from inhaled air.