Smoking is not harmful to the lungs, because it is impossible for smoke not to enter the lungs. Most people think that when they smoke, the smoke goes in through the mouth and out through the nose, so the smoke does not enter the lungs and there is no damage to the lungs. Because when smoking, when the nose smells smoke, the smoke has entered the lungs, which is equivalent to smoking secondhand smoke, secondhand smoke on the body’s damage, we all know, and is also recognized as a hazard. So smoking is not lung, this statement itself is not true. Smoking is very harmful to the body, and each organ has a certain damage, the following two parts from the heart and lungs briefly: 1, there is damage to the airway mucosa, but also to promote mucus secretion increased. People who smoke have more phlegm and cough easily, and also reduce the ability to clear the airways; 2, the cardiovascular impact, smoking has damage to the endothelium of blood vessels, and is likely to increase the incidence of coronary heart disease. So it is best not to smoke, if you smoke now, it is recommended to quit smoking, quit smoking is beneficial to the body.