Schematic representation of the MucilAirâ„¢ pseudostrati ed respiratory epithelium grown on the surface of a porous membrane with culture medium on the basal side and air on the apical side.
The trachea has a number of adaptations: cartilage rings in the walls of the trachea help to keep it open ciliated epithelium and ... them entering the lungs. Cilia are small hairs which beat ...
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