how does cigarette smoke affect the lungs Many people think smoking only on weekends or at parties is harmless, but doctors warn there is no safe amount of tobacco. Find out even occasional smoking damages your heart Smoking - The respiratory system

Smoking The respiratory system in humans WJEC GCSE Biology (Single Science) Revision WJEC BBC Bitesize Smoking causes deep, progressive damage to the lungs by destroying air sacs, narrowing airways, reducing oxygen exchange, and weakening natural cleansing mechanisms. Over time, it leads to chronic cough, breathlessness, COPD, and Smoking does not just affect your breath. It destroys your lungs from the inside. Every cigarette exposes your lungs to toxic chemicals that: Coat the lungs with sticky tar Damage How Cigarette Smoking can affect your Lungs Why Smoking ANYTHING Can Cause Lung Cancer YouTube Smoking: Effects, Risks, Diseases, Quitting & Solutions

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