A normal bronchiole and an asthmatic bronchiole in the human respiratory tract.

ABNORMAL • ANATOMY • ARTWORK • ASTHMA • BACTERIA • BARE TORSO • BIOLOGY • BIOMEDICAL ILLUSTRATIONS • BLOOD VESSELS • BREATH • BREATHING • BRONCHIAL TUBES • BRONCHIOLE • BRONCHITIS • BRONCHUS • CARTILAGE • CHRONIC ILLNESS • CLOGGED • CLOSE UP • CLOSE-UP • CLOSEUP • COLOR IMAGE • COLOUR IMAGE • COMPARISON • CROSS SECTION • DETAIL • DIAGRAM • DIGITALLY GENERATED IMAGE • DISEASE • ENLARGEMENT • FOREGROUND • FRONT VIEW • GROSS ANATOMY • HEALTHY • HORIZONTAL • HUMAN BODY • HUMAN LUNGS • ILLUSTRATION • ILLUSTRATIONS • INFECTION • INFLAMMATION • LUNG • MAGNIFICATION • MEDICAL CONDITION • MEDICAL • MEDICINAL • MEDICINE • MICROBIOLOGY • MICROSCOPIC • MUCOUS • MUCUS • NO PEOPLE • OBSTRUCTION • PATHOGEN • PATHOLOGY • PULMONOLOGY • RESPIRATORY SYSTEM • RESPIRATORY TRACT • SECRETION • SIDE ELEVATION • STRUCTURE • SWOLLEN • TEXT • TORSO • TRACHEA • TRACHEAL RINGS • TRUNK (BODY) = TORSO • TRUNK (BODY) • UNHEALTHY • UPPER BODY • VIRUS • WESTERN SCRIPT • WINDPIPE • WITHOUT PEOPLE