Goblet cells and mucociliary clearance.
D001980:Bronchi / Q000473:pathology; D001991:Bronchitis / Q000473:pathology*; D004847:Epithelial Cells; D004848:Epithelium / Q000473:pathology; D006801:Humans; D009092:Mucous Membrane / Q000473:pathology; D009093:Mucus / Q000378:metabolism