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Cigarette smoking is one of the major killers in the world The biggest side affect from smoking is Cancer Cancer is a group of many related diseases All forms of Cancer involve out-of-control growth and spread of abnormal cells The American Cancer Society estimates that cigarettes are responsible for about 419000 deaths in the united states each year The largest killing cancer is Lung Cancer which accounts for 30 of all US cancer deaths The risk of dying from lung cancer is 22 times higher for males and 12 times higher for female smokers as oppose to nonsmokers Additionally smokers are at an increased risk for cancer of the larynx oral cavity esophagus bladder kidney and pancreas Health effects of smoking Smoking causes a five time increase in the risk of dying from chronic bronchitis and emphysema and a two time increase in deaths from diseases of the heart and coronary arteries Smoking also increases the risk of stroke by 40-50 in men and 60 in women Researchers have also proven that mothers who smoke while pregnant or before they got pregnant usually give birth to babies with birth defects who are premature or are underweight This is probably because of a decrease in blood flow to the placenta Tobacco Smoke The ways in which tobacco smoke affects the human body have been under extensive research and study for many years Recent findings may explain why cigarettes are so addicting An unknown component or part of tobacco smoke appears to destroy an important enzyme in the brain called monoamine oxsidase B MOA B The enzyme is essential in breaking down excess amounts of the chemical dopamine a nerve cell messenger chemical and one that is involved in pleasure-seeking behaviour Apparently smokers have low levels of MOA B and have exceptionally abnormal levels of dopamine which most likely encourage the smoker to go for the more pleasure seeking things such as smoking and
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