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Air is drawn in via the nostrils or external nares and enters the large nasal cavity, which is divided into two by the nasal septum. Like the rest of the respiratory tract, the nose is lined with mucosal epithelium containing glands that secrete a thick, sticky mucus that helps to moisten the tract..WebMD explains how your lungs and respiratory system work by taking in air, You inhale air into your nose or mouth, and it travels down the back of your Impurities that do reach the deeper parts of the lungs can often be .
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