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Originally Posted by chagrin
In three days cilia start to regenerate and usually within 6 months the normal cilia function is returned. Also over time, the extra layers of cells will be sloughed off and the lining tissue of the bronchus will return to normal.
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Dude those are not even in your lungs. Its your nose and throat they are talking about. Cilia are what your body uses naturally to move mucus out of your lungs. Smokers burn off that layer. Thats the main reason why they cough, no cilia to remove mucus. Nothing to do with oxygen exchange at the cellular level.