Effects of smoking - Respiratory system - GCSE Biology ... - BBC

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The mucus is normally swept out of the lungs by the cilia. on the epithelial cells. lining the trachea, bronchi. and bronchioles . However, cigarette smoke ... ChangelanguageEnglishCymraegGaeilgeGàidhligAllBitesizeRevise5Page5of5nextEffectsofsmokingWarningssuchas'Smokingkill



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