It is a cliche that smoking is harmful to health. Smoking is an important pathogenic factor of cardiovascular and cerebrovascular diseases, cancer, chronic obstructive pulmonary disease and other diseases. Smoking has become the second global killer after hypertension. In particular, smoking is the primary risk factor for lung cancer. It is urgent to put an end to smoking! According to statistics, 5 million people worldwide die of smoking-related diseases every year. If not controlled, this number will reach10 million by 2020. At present, there are 350 million smokers in China, and about1million people die of smoking-related diseases every year. According to 30,000 physical examination samples taken by Hua Zhaoyisheng in 2006, at present, nearly 70% of male physical examination participants are smokers; Among female medical examiners, this figure also accounts for 8%. In the face of the international trend that the smoking population in developed countries is generally declining, why does China not fall but rise? The relationship between smoking and diseases 1. The relationship between smoking and lung cancer Many studies have proved that there is a close relationship between cigarettes and lung cancer. From 19 15, the consumption of cigarettes in the United States at that time was18 billion cigarettes per year, and by 1984, the consumption of cigarettes increased to more than 600 billion cigarettes per year; The death toll of lung cancer increased from 4,300 in 1935 to121000 in 1984. It is proved that the consumption of cigarettes has always been in direct proportion to the number of lung cancer deaths, so lung cancer has become one of the main causes of death since 1935. Investigation shows that more than 80% of the patients who died of lung cancer in China were caused by smoking and passive smoking. Second, the impact of smoking on the respiratory tract Because smoking can cause gland hyperplasia of trachea and bronchus, there will be ulcer inflammatory reaction in the small respiratory tract at the beginning of smoking, so people who smoke often cough and have phlegm. With the increase of smoking time, mucocilia are exposed to cigarette smoke for a long time, which will hinder the elimination ability of human respiratory mucosal fibers and lead to acute bronchitis. Third, the influence of smoking on lung tissue and function has been confirmed, smoking can lead to emphysema. It is estimated that 80%~90% of the morbidity and mortality of chronic obstructive pulmonary disease are related to smoking. Smoking reduces people's lung function, especially for heavy smokers. The influence of smoking on the cardiovascular system 1. Smoking can easily cause blood vessel obstruction, thus causing various diseases. 2. The cigarette will produce carbon monoxide after burning, which will cause the human body to inhale about 400PPM of carbon monoxide, thus affecting the oxygen transmission function of the blood. 3. Smoking can increase the total cholesterol and free fatty acids in the blood, which can cause angiomatosis. Smoking doubles people's chances of suffering from heart disease. Each cigarette can produce more than 4000 compounds after burning, some of which are scattered in the air. Some of them are inhaled into lung tissues, and these compounds include nicotine, tar, carbon monoxide, dozens of stimulating substances and more than 40 carcinogens. Among them, nicotine has the function of central nervous system stimulant and refreshing, which is the main substance that causes cigarette addiction. In order to obtain nicotine, addicts inhale more toxic substances and carcinogens that cause cell pathological changes. In addition, nicotine will increase heart rate, raise blood pressure and cause contraction of peripheral blood vessels, which will easily lead to cardiovascular diseases for a long time. Carbon monoxide will hinder the combination of normal oxygen and heme, resulting in hypoxia in the body and even death in severe cases. Tar and irritants are the culprits of chronic obstructive pulmonary diseases such as chronic bronchitis and emphysema and various cancers. These substances are not necessary for us, and always endanger the health of drug addicts and second-hand smokers. Smoking or inhaling second-hand smoke during pregnancy can easily lead to stillbirth, increased neonatal mortality, lighter birth weight, spontaneous abortion and premature delivery. Because the mother smokes during pregnancy, nicotine and carbon monoxide in the smoke can be transmitted to the fetus through the placenta, and the fetus is also injured, so that the fetus is always in this state, and the development of the fetus will naturally slow down. The harm of smoking to health is by no means alarmist. I hope that the majority of smokers will correctly understand the harm of smoking, and that there will be fewer and fewer smokers in China and more and more healthy people in China. For the health of you and your family, please give up smoking!