The definition for bronchitis is the inflammation of the bronchi. Bronchi are large tubes that extend or branch into smaller tubes within the lungs known as bronchioles. There is two types of bronchitis. Generally, acute bronchitis is related with a respiratory tract infection. Even though allergies may cause this condition in certain people, chronic bronchitis is normally cause by smoking. Emphysema is a chronic lung disease. It is characterized by the symptoms of hypercapnia, a chronic cough called dyspnea, formation of a barrel chest due to labored breathing, and a steady or gradual deterioration caused by chronic hypoxemia. When the alveolar walls deteriorate, the symptoms arise, which results in a loss of elasticity that causes a difficulty
