Составить во к тексту 10 штукCigarette smoking is a harmful habit which reduces the expectation of good health and shortens life. Cigarette smokers absorb into the lungs: 1. Nicotine. This is a habit-forming drug with a mild stimulatory effect. It causes construction of small blood vessels and a rise in blood pressure. 2. Carcinogenic tars. These tars isolated from cigarette smoke have been shown to cause cancer in experimental animals. 3. Carbon monoxide. Cigarette smokers have raised blood levels of carboxyhaemoglobin passes through into the fetal circulation. The following ailments are prone to occur in cigarette smokers: 1. Cancer of the lung. Heavy cigarette smokers are 30 times as liable to develop cancer of the lung as non-smokers are. There is overwhelming evidence that lung cancer is caused by cigarette smoking. 2. Bronchitis and emphysema. Prolonged cigarette smoking commonly leads to progressive cough and breathlessness, ultimately leading to respiratory incapacity. Gastric and duodenal ulcers take longer to heal in cigarette smokers. Pregnant women who smoke cigarettes have smaller babies than nonsmokers, with a higher incidence of fetal abnormalities.

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