Which of the following organs is most commonly affected by smoking tobacco products?
Lungs
When tobacco is smoked, the smoke containing nicotine, tar, carbon monoxide and other harmful chemicals is inhaled directly into the respiratory tract.
These substances damage the air sacs (alveoli) and the lining of the airways, causing diseases such as lung cancer, chronic bronchitis, emphysema and chronic obstructive pulmonary disease (COPD).
Since the smoke first and most directly reaches the respiratory organs, the lungs are the organs most commonly affected.
Hence, the answer is lungs.
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