It is the primary breathing muscle. Lungs damaged due to smoking are black or gray, inflated, and inflamed. The diaphragm of a smoker with lung damage will show muscle loss. Smoking can cause ...

People commonly refer to the black-pigmented material in cigarette ... which changes the lungs’ shape. Smoking causes the lungs to produce more mucus. This occurs because the smoke damages ...

Pollutants, infections, and lung cancer may cause black mucus or phlegm ... People who have darkened mucus due to smoking should stop smoking. In addition to clearing up the mucus, quitting ...