Lung capacity: Lung capacity refers to the maximum amount of air that can be inhaled and exhaled by the lungs. It can be affected by respiratory diseases.
Bronchitis: Bronchitis is an inflammation of the bronchial tubes, which carry air to and from the lungs. It is often caused by viral or bacterial infections.
Emphysema: Emphysema is a type of chronic obstructive pulmonary disease (COPD) characterized by damage to the air sacs in the lungs, making it difficult to breathe.