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Smoking and its effects on the body I am doing my drug project on smoking In some countries smoking causes one-third of all cancer deaths It causes diseases of the heart lung digestive tract kidney bladder There are many other health risks There are over 4000 chemicals in cigarette smoke and 200 of those are known poisons Pregnant women who smoke may have miscarriages low birth weight still birth and premature birth There are a few reasons why people smoke Most teenagers smoke because they want to rebel they think it will make them cool and if everyone is doing it it makes them feel like part of a group Adults usually smoke because they find it relaxing or refreshing These two opposite effects are caused by nicotine Another reason people smoke is because ads such as Joe Camel and Marlboro Man that make smoking seem cool sexy and attractive Also because it is seen in movies on TV and at sporting events Cigarettes have one main dangerous ingredient in them That dangerous ingredient is nicotine It is a poisonous alkaloid and is what makes smoking addictive It can act like a stimulant or a tranquilizer In tobacco smoke there are two really dangerous elements They are carbon monoxide and tar Carbon monoxide is a gas Carbon monoxide disrupts the supply of oxygen to tissues and organs which includes the brain and heart Tar is made up of different particulate substances Tar collects on the airways of the lungs and impairs their functioning If a person gets too many particulates on their lungs they can cause chronic bronchitis and emphysema Smoking causes many diseases and health problems One major health hazard caused by smoking is lung cancer Lung cancer is caused by particulates from tar that gather on the airways of the lungs Another health problem caused by smoking is Bronchitis Tobacco smoke aggravates the membranes lining the bronchial tubes Smoking also causes
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