Health Sciences 1001A/B Lecture Notes - Sidestream Smoke, Coronary Artery Disease, Canadian Cancer Society

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Document Summary

Smoking is the most preventable cause of disease and premature death in canada. Every cigarette a person smokes reduces life expectancy by approximately 11 minutes. More than 37 000 people die prematurely each year in canada due to tobacco use. Tobacco use is widespread in our society. An addiction involving physical dependence on the psychoactive drug nicotine a poisonous, addictive substance found in tobacco and responsible for many of the effects of tobacco . Addicted users must keep a steady amount of nicotine in the blood and going to the brain. Nicotine addiction can start within a few days of smoking and after just a few cigarettes. If that amount decreases, they experience withdrawal symptoms. Negative effects on nearly every organ of body and decrease overall health. Related to more than two dozen diseases and conditions. Contain more than four thousand chemicals, at least fifty that are carcinogens or co-carcinogens and/or irritate the tissues of the respiratory system.

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