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Smoking & Respiratory Health: Impact on the Lungs Smoking exposes the respiratory system to toxic chemicals that damage airway lining and lung tissue. The cilia that normally clear mucus become impaired, leading Smoking The respiratory system in humans WJEC GCSE Biology (Single Science) Revision WJEC BBC Bitesize Smoking and its effect on the breathing system How does smoking starve your heart of oxygen? HowStuffWorks How Cigarette Smoking can affect your Lungs

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