Trachea cross-section showing normal and asthmatic bronchiole.

ABNORMAL • ABSTRACT • ANATOMY • ARTWORK • ASTHMA • BACTERIA • BIOLOGY • BIOMEDICAL ILLUSTRATIONS • BREATH • BREATHING • BRONCHIAL TUBES • BRONCHIOLE • BRONCHITIS • BRONCHUS • CARTILAGE • CHRONIC ILLNESS • CLOGGED • CLOSE UP • CLOSE-UP • CLOSEUP • COLOR IMAGE • COMPARISON • CROSS SECTION • DETAIL • DIAGRAM • DIGITALLY GENERATED IMAGE • DISEASE • ENLARGEMENT • FOREGROUND • GROSS ANATOMY • HEALTHCARE • HEALTHY • HORIZONTAL • ILLUSTRATION • INFECTION • INFLAMMATION • MAGNIFICATION • MEDICAL • MEDICINAL • MEDICINE • MICROBIOLOGY • MICROSCOPIC • MUCOUS • NO PEOPLE • OBSTRUCTION • ORGAN • PATHOGEN • PATHOLOGY • PINK • RESPIRATORY SYSTEM • SECRETION • SIDE ELEVATION • STRUCTURE • SWOLLEN • TRACHEA • TRACHEAL RINGS • UNHEALTHY • VIRUS • WINDPIPE • WITHOUT PEOPLE