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Overview

Emphysema is a type of lung disease classified as a chronic obstructive pulmonary disease (COPD). It is an irreversible, progressive condition characterized by inflammation and reduced airflow in the lungs. Emphysema often occurs in combination with chronic bronchitis. The most common cause is cigarette smoking.

Anatomy
The lungs are the major organs of the respiratory system. During inhalation, the body takes in air through the nose and mouth. This oxygen-rich air travels throu...Read the full article