ch. 17.2: smoking and your health. 17.2.1 what harmful chemicals are found in tobacco smoke?
TRANSCRIPT
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Ch. 17.2: Smoking and Your Health
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17.2.1 What harmful chemicals are found in tobacco smoke?
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Chemicals in Tobacco Smoke
• Deadly chemicals in Tobacco:– Tar– Carbon Monoxide– Nicotine
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Tar
• A dark sticky substance that forms when tobacco is burned.
• Tar clumps up in the lungs when inhaled.• It causes lungs to turn a dark color.
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Carbon Monoxide
• A colorless, odorless (no smell) gas.• It is dangerous because it sticks to blood
instead of oxygen and then doesn’t let go!• You end up suffocating.
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Nicotine
• A stimulant drug that is addictive.• This is why smokers have trouble quitting. • NEVER START!
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17.2.2 How can tobacco smoke affect a person’s health over time?
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Health Problems and Smoking
• It burns the cilia (little hairs that move mucus out of the lungs so you don’t choke on it).
• Too much mucus prevents oxygen from getting to the lungs.
• Over time, you can get breathing diseases:– Chronic Bronchitis– Emphysema– Lung Cancer– Artherosclerosis
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Chronic Bronchitis
• Bronchitis is the swelling of the bronchi.• Sometimes, its so bad, it closes up and you
can’t breathe.• Chronic means it is all the time and never goes
away.
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Emphysema
• Emphysema is a serious disease that destroys lung tissue and SERIOUS difficulty in breathing.
• It is PERMANENT.
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Lung Cancer
• About 140,000 Americans die each year from lung cancer related to smoking.
• Cigarette smoke contains more than 50 cancer causing chemicals.
• Cancer in the lungs takes away space for breathing.
• It is rarely caught in time and has a high fatality rate.
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Atherosclerosis
• The chemicals in smoke also harm the Circulatory System.
• Some of these chemicals are absorbed into the blood.
• These chemicals also make blood vessels swell (like bronchitis) and then fatty materials get stuck to it leading to heart attacks.
• Smokers are 2x more likely to have heart attacks than non-smokers.
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