คำอธิบาย
Respiratory diseases are pathological conditions affecting the organs and tissues that make gas exchange difficult. They include conditions of the respiratory tract including the trachea, bronchi, bronchioles, alveoli, pleura, pleural cavity, and the nerves and muscles of respiration. About 65 million people suffer from chronic obstructive pulmonary disease (COPD) and 3 million die from it each year, making it the third leading cause of death worldwide.