When a person smokes, harmful chemicals within the tobacco are released into the body, causing damage to lung tissue, mucus glands and other parts of the respiratory system. The first time the person smokes, their lungs may repair themselves, but may fail to do so due to the continual use and intake of all these toxins which damages the cells and prevents them from repairing and regenerating. Smoking can cause many different types of respiratory diseases; two of which, are emphysema and chronic bronchitis. In emphysema, the air spaces within the lungs expand as a result of damaged or ruptured alveoli, causing difficulty in breathing and a greater chance of infection. Chronic bronchitis is a disease that causes inflammation of the bronchioles,
