2. Cause and Pathogenesis1)virus(病毒）2)cigarette smoke(吸烟）3)atmosphericpollution4)anaphylaxis（变态反应）impairing bronchial mucosa支气管黏膜上皮的损害
2. Cause and Pathogenesis 1) virus (病毒) 2)cigarette smoke(吸烟) 3)atmospheric pollution 4)anaphylaxis (变态反应） impairing bronchial mucosa 支气管黏膜上皮的损害
Respiratory EpitheliumMucus escalatorStructure?Nasal cavityMucusParticleCiliaMucusprodiPharynxbyEpithelialcellGobletcellDefense by means of?filtering hairs·ciliary escalator?sticky mucous
Respiratory Epithelium Structure? Mucus produced by _ Mucus escalator Defense by means of •filtering hairs •ciliary escalator •sticky mucous