There are a number of physiological effects that take place in the human body after cessation of smoking. About twenty minutes after cessation, the blood pressure and pulse rate return to normal, and the body temperature increases to normal. About 8 hours later, the carbon monoxide level in the blood drops to normal, and after 1 day, an individual s chance of a heart attack decreases. After two days, nerve endings start to regenerate, and the ability to smell and taste is improves. After two weeks, an individual s circulation improves and the functionality of the lungs increase by a maximum of 30 percent. After a year of smoking abstinence, the risk of coronary heart disease is reduced to half that of a smoker, and after five years of cessation, the risk of death by lung cancer is cut in half. After fifteen years, the risk of coronary heart disease is equal to that of a nonsmoker.
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