The mucociliary apparatus.
D001826:Body Fluids; D002923:Cilia / Q000502:physiology*; D006801:Humans; D009092:Mucous Membrane / Q000502:physiology*; D009093:Mucus; D009297:Nasal Mucosa / Q000502:physiology; D010587:Phagocytosis; D012143:Respiratory Physiological Phenomena