title: Defensive mechanisms of the respiratory system.
mesh_terms: D000336:Aerosols / Q000009:adverse effects*; D002923:Cilia / Q000502:physiology; D005547:Foreign Bodies; D006801:Humans; D007509:Irritants / Q000494:pharmacology*; D009093:Mucus / Q000502:physiology; D012018:Reflex; D012119:Respiration; D012143:Respiratory Physiological Phenomena; D012137:Respiratory System / Q000187:drug effects / Q000276:immunology; D012141:Respiratory Tract Infections
chemical_list: D000336:Aerosols; D007509:Irritants