A damaged lung may be unable to remove used air; this would cause an increase in the amount of bloodoxygencarbon dioxideforeign particles in the body.

The lungs remove carbon dioxide from the blood when you breathe out. If damaged lungs cannot remove used air effectively, carbon dioxide can build up in the body. Therefore, the amount of carbon dioxide would increase; oxygen is taken into the body during breathing, not the waste gas that builds up here.

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