What is COPD?

Chronic Obstructive Pulmonary Disease
Chronic bronchitis and emphysema are the two most common conditions of COPD.
COPD Remains Widely Undetected
COPD develops slowly, and people are often not diagnosed with it until their 50s, when the disease has greatly affected their lung function.
Anatomy of the Respiratory System
The respiratory system includes the nose, pharynx, larynx, trachea, and lungs.
How Your Lungs Work
Your lungs are remarkable organs with multiple roles. Each day, up to 2,300 gallons of air pass through your lungs.
Chronic Bronchitis
Chronic bronchitis is a long-term inflammation of the bronchi, which results in increased production of mucus.
Pulmonary Emphysema
Emphysema is a chronic lung condition in which the air sacs of the lungs are damaged or destroyed. This damage is irreversible.
COPD: More of Us Are Out of Breath
You take an average of 16 breaths every minute. It's a reflex—you don't pay attention unless there's a problem. But a rising number of us literally can't catch our breath.
COPD: Terms to Know
A short glossary of terms associated with chronic obstructive pulmonary disease.