Tobacco and its Dangers

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Presentation transcript:

Tobacco and its Dangers www.assignmentpoint.com

Tobacco smoke Tobacco smoke contains about 1000 chemicals, many of them being harmful Smoking kills 12 times the number of people killed in road accidents It contains nicotine which is addictive Tar is a black sticky substance that forms in the moist lungs Tar contains 17 chemicals (carcinogens) that are known to cause cancer Carbon monoxide is a poisonous gas that stops red blood cells from carrying oxygen around the body www.assignmentpoint.com

Heart disease Heart disease is 3 times more common among smokers Smokers have more chance of a heart attack (when the heart stops working) www.assignmentpoint.com

Healthy, clean lungs A healthy lung looks like a pink sponge The air sacs give the lungs a large surface area for gas exchange to take place This ensures that enough oxygen gets into the blood and around the body www.assignmentpoint.com

Lung cancer Cancers of the lungs, mouth, gullet (oesophagus), and the bladder are caused by chemicals called carcinogens in tobacco smoke 9 out of 10 people who die from lung cancer are smokers www.assignmentpoint.com

Emphysema Emphysema is a lung disease caused by tar. Lung tissue is destroyed and large holes develop which blow up like balloons. Breathing becomes very difficult. www.assignmentpoint.com

Bronchitis This lung disease is usually found in smokers The air passages (bronchi) to the lungs become irritated by smoke These air passages become swollen and sore There are tiny hairs called cilia which keep these air passages clear Smoking damages these cilia and stops them working The lungs fill up with mucus which the smoker now has to try and physically cough up! www.assignmentpoint.com

Other problems caused by smoking: Tobacco smoke is often very unpleasant for other people It makes your breath, hair, clothes and house smell It can irritate those who suffer with hayfever or asthma Passive smokers can also develop lung damage Pregnant mothers who smoke can have smaller babies than non-smokers. The babies also have an increased risk of getting asthma It is thought that smoking in a house may contribute to causing cot deaths www.assignmentpoint.com