title: Lung defense mechanisms (first of two parts).
mesh_terms: D000402:Airway Obstruction / Q000503:physiopathology; D000818:Animals; D001980:Bronchi / Q000378:metabolism / Q000502:physiology; D001991:Bronchitis / Q000503:physiopathology; D002923:Cilia / Q000502:physiology / Q000648:ultrastructure; D003165:Complement System Proteins / Q000502:physiology; D003371:Cough / Q000503:physiopathology; D003550:Cystic Fibrosis / Q000503:physiopathology; D005088:Exocrine Glands / Q000502:physiology; D005374:Filtration; D006801:Humans; D008168:Lung / Q000276:immunology / Q000378:metabolism / Q000502:physiology* / Q000503:physiopathology / Q000648:ultrastructure; D009038:Motion; D009093:Mucus / Q000502:physiology; D010316:Particle Size; D012123:Pulmonary Ventilation; D012018:Reflex; D012119:Respiration; D012907:Smoking / Q000503:physiopathology; D014132:Trachea / Q000378:metabolism
chemical_list: D003165:Complement System Proteins