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  • 1. Tobacco
  • 2. What is Tobacco? • Tobacco is a tall, leafy annual plant, originally grown in South and Central America, but now cultivated throughout the world, including southern Ontario. There are many species of tobacco; Nicotiana tabacum (or common tobacco) is used to produce cigarettes.
  • 3. Nicotine? • Nicotine, a powerful central nervous system stimulant found naturally in the tobacco leaf, is classified as a drug. Nicotine is one of the main ingredients in tobacco.
  • 4. How is it used? • Tobacco leaves can be burned and inhaled (in the form of cigarettes, cigars, pipes, smoke, etc.) or absorbed through the mouth (in the form of spit tobacco, chew, or snuff). The membranes in the nose, mouth and lungs act as nicotine delivery systems - transmitting nicotine into the blood and to the brain.
  • 5. Short Term Effects • Smokers usually feel dizzy and sick when they first inhale the nicotine in tobacco, but gradually build up tolerance to its effects. Other symptoms new smokers experience includes coughing, a dry, irritated throat as well as nausea, weakness, abdominal cramps, headache, coughing or gagging. These symptoms subside as the user develops a tolerance to nicotine.
  • 6. Why Continue to Smoke? • Nicotine is highly addictive. The addictive effect of nicotine is the main reason why tobacco is widely used. Many smokers continue to smoke in order to avoid the pain of withdrawal symptoms. Smokers also adjust their behavior (inhaling more deeply, for example) to keep a certain level of nicotine in the body.
  • 7. Quitting • Stopping can produce unpleasant withdrawal symptoms including depression, insomnia, irritability, difficulty concentrating, restlessness, anxiety, decreased heart rate, increased appetite, weight gain, and craving for nicotine.
  • 8. Second Hand Smoke • Second-hand smoke consists of mainstream smoke, the smoke inhaled and exhaled by the smoker, and side stream smoke, the smoke released directly from the end of a burning cigarette.
  • 9. continued.. • Smoke does a lot of damage – and not just to smokers. Anyone who’s near a lit cigarette, pipe or cigar is probably breathing second-hand smoke. Two-thirds of the smoke from a burning cigarette is not inhaled by the smoker but enters the surrounding environment. The contaminated air is inhaled by anyone in that area.
  • 10. Effects of 2nd Hand Smoke • * Lung cancer • * Heart disease • * Asthma • * Reduced lung function • * Bronchitis • * Middle ear infections • * Pneumonia
  • 11. Toxic Fumes • A non-smoker breathing second-hand smoke can be exposed to 4,000 different chemicals, 50 of which are associated with or known to cause cancer. • Second-hand smoke has twice as much nicotine and tar as the smoke that smokers inhale. It also has five times the carbon monoxide which decreases the amount of oxygen in your blood.
  • 12. Where Did I Find This Information? • http://www.tobaccofacts.org/secondhand/ index.html • http://www.thetruth.com
  • 13. Your Assignment • Go to • http://www.thetruth.com/facts/useFulCig/
  • 14. Your Assignment • Using the interactive tool, write an email to me about the different chemicals found in tobacco smoke. • Describe at least 6 chemicals in detail. Tell me the name and what is it commonly used for. • Tell me if you think smoking is a good or bad idea.