Chronic obstructive pulmonary disease
Chronic Obstructive Pulmonary Disease (COPD) is a problem with the lungs' ability to exhale (breathe out). This causes problems by stretching the bottom of the lungs. People with COPD have difficulty breathing because of the old air trapped in the lungs.
Types of COPD[change]
|Wikimedia Commons has media related to: Chronic obstructive pulmonary disease|