3. Why does a smoker often cough?
A tar sticks to the cilia
B mucus gets thicker
8...
Health, 22.04.2020 16:36 skgoldsmith
3. Why does a smoker often cough?
A tar sticks to the cilia
B mucus gets thicker
80%
C toxins irritate the lining
80%
D bronchi restrict air flow
Answers: 2
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