It is built into the lungs protective mechanisms. There is a continuous flow of particle capturing mucus from glands in the tissue that move it up to the center/top where it makes it into the swallow tube where it is swallowed or it is coughed out. You can overwhelm that system by constant exposure/bad habits(smoking) but it works well. Consult a pulmonologist for specific needs.
Answered 8/23/2021
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A doctor has provided 1 answer
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