title: Pulmonary defense mechanisms: friend and foe.
mesh_terms: D001980:Bronchi / Q000378:metabolism; D003165:Complement System Proteins / Q000502:physiology; D006801:Humans; D008168:Lung / Q000166:cytology / Q000502:physiology*; D008171:Lung Diseases / Q000276:immunology / Q000503:physiopathology; D008214:Lymphocytes / Q000502:physiology; D008264:Macrophages / Q000502:physiology; D009093:Mucus / Q000378:metabolism / Q000502:physiology; D009504:Neutrophils / Q000502:physiology; D010587:Phagocytosis; D011650:Pulmonary Alveoli / Q000502:physiology
chemical_list: D003165:Complement System Proteins