Medical comparison of healthy alveoli and an unhealthy emphysema alveoli.

ABNORMAL • ALVEOLI • ALVEOLO • ALVEOLUS • ANATOMY • ARTWORK • BIOLOGY • BIOMEDICAL ILLUSTRATIONS • BLACK BACKGROUND • BRONCHITIS • BROWN • CAPILLARY • CHRONIC ILLNESS • CHRONIC OBSTRUCTIVE PULMONARY DISEASE • CLOSE UP • CLOSE-UP • CLOSEUP • COLOR IMAGE • COMPARISON • DETAIL • DIGITALLY GENERATED IMAGE • DISEASE • EMPHYSEMA • ENLARGEMENT • FOREGROUND • GROSS ANATOMY • HEALTHCARE • HORIZONTAL • ILLUSTRATION • INFECTION • MAGNIFICATION • MEDICAL • MEDICINAL • MEDICINE • MICROBIOLOGY • MICROSCOPIC • NO PEOPLE • RESPIRATORY SYSTEM • SCIENCE • SPANISH VERSION • TEXT • THREE DIMENSIONAL • UNHEALTHY • WESTERN SCRIPT • WITHOUT PEOPLE