PASCAL MARSEAUD, ISM / SCIENCE PHOTO LIBRARY PASCAL MARSEAUD, ISM / SCIENCE PHOTO LIBRARY
COPD. Artwork showing sections through two bronchioles (airways, tubes) from the lungs: normal (left) and stenosed (narrowed, right). Here, the narrowing has been caused by chronic obstructive pulmonary disease (COPD), a disease found mainly in smokers.
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