Are the lungs able to filter out some harmful pollutants and/or chemicals and if so, how?
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Yes, mucous/phlegm and small hairs help move contaminants up to the throat where they get swallowed. One reason asbestos particles are dangerous is because they’re too small and sharp to get removed.
And the cleaning only works to a small degree. Habitual smokers lungs will still contain lots of residue.
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