Smoking is harmful to health composition 1 Smoking is a very common social phenomenon all over the world, and the harm of smoking to health has attracted more and more attention. The research results in recent decades show that smoking is harmful to health and even makes people die early. Many teenagers don't know much about this, and they have developed the habit of smoking and even become addicted when they were students. In this regard, it really deserves our attention and serious treatment.
I. Chemical composition of flue gas and its influence on human body
1. Irritating compound
When a person who has never smoked smokes for the first time, he coughs because the smoke acts on the receptors of respiratory mucosa, mainly because the smoke contains a variety of irritating compounds, such as hydrogen cyanide, formaldehyde and acrolein. Long-term smokers, stimulated by smoke, can damage epithelial cells with cilia on bronchi that can exclude foreign bodies and mucus, and weaken the function of macrophages that devour foreign bodies in alveoli. If bacteria invade and stay in lung tissue for a long time, it will cause lung inflammation.
2. Systemic harmful substances
Systemic harmful substances refer to organic or inorganic compounds that the virus acts not only on one organ, but also on one or some systems. A considerable part of the smoke belongs to this disease, including phenols, aldehydes, ketones, alcohols, amines and so on. Many experimental results show that many compounds in smoke can cause systemic reactions, among which nicotine and carbon monoxide are the most typical and prominent. The content of nicotine in cigarettes is the most, followed by carbon monoxide, which is an important factor causing cardiovascular diseases.
3. Carcinogens
There are many carcinogens in the smoke. Among these compounds, some are called initiators, which have direct carcinogenic effects, such as benzopyrene and benzoanthracene. There is also a carcinogenic compound as a synergist, such as methyl pyrene.
Second, the physiological effects of smoking.
1. Effect of smoking on blood components
Effect of (1) on the concentration of carboxyhemoglobin.
Oxygen is the most important factor to maintain life activities. After breathing through the lungs, oxygen is transported to the whole body by blood. The transport of oxygen in the body is not only a general physical dissolution, but about 98% of its total weight is transported by combining with hemoglobin in red blood cells to form oxygenated hemoglobin, and the affinity of hemoglobin with oxygen is 200% smaller than that of carbon monoxide. 300 times, the concentration of carbon monoxide in flue gas is relatively high, generally above 4%. The results showed that the average concentration of carboxyhemoglobin in the blood of non-smokers was 1. 1%, while that of smokers was 40.8%. The increase of free carbon monoxide in carboxyhemoglobin is an important reason for various cardiac reactions.
② Changes of blood oxygen partial pressure
The researchers conducted a laboratory study on the effect of smoking on the partial pressure of oxygen in coronary sinus, artery and vein of patients with coronary heart disease. Subjects were forbidden to smoke 12 hours. During the measurement, they were first asked to smoke a cigarette, the second cigarette twice after 5 minutes and the third cigarette twice after 30 minutes. The results showed that the partial pressure of oxygen in coronary sinus, artery and vein decreased after smoking. The same rule was that smoking immediately caused the partial pressure of oxygen to decrease every 1 time, and it recovered to varying degrees after smoking the second cigarette for 30 minutes. After smoking the third cigarette, the oxygen partial pressure dropped to the lowest point, and compared with before smoking, the coronary sinus, artery and vein decreased by 0.39 respectively. Clinical observation shows that smoking can promote angina pectoris.
③ Changes in the number of white blood cells
The results show that smoking can cause the increase of white blood cells. According to statistics, the number of white blood cells of smokers is higher than that of non-smokers 17%, mainly because nicotine stimulates adrenal medulla and cortex, and the increase of adrenaline and adrenocortical hormone secretion leads to leukocytosis.
2. The effect of smoking on cardiovascular function
The heart rate of smokers is faster than that of non-smokers, and smoking can raise blood pressure, which is proved by experiments. Smoking can also lead to decreased cerebral blood flow, hyperlipidemia, heart disease and diabetes.
3. The effect of smoking on lung function
Smoking has a great influence on the ventilation function of the lungs. Smokers' vital capacity decreases, which easily leads to lung diseases.
4. The influence of smoking on brain activity
The results show that smoking can not only reduce people's tolerance to hypoxia, but also shorten the effective consciousness time caused by hypoxia, and carbon monoxide has obvious influence on brain function. Inhale low-concentration carbon monoxide, and the blood oxygen concentration is only 2%? 3% can reduce judgment in a short time. When the concentration of carboxyhemoglobin is 4%, the sensitivity of eyes to light will decrease, and when the concentration of carboxyhemoglobin is 5%, the performance of mental arithmetic will decrease. The content of carbon monoxide in smoke is above 4%, and the concentration of carboxyhemoglobin in people who smoke more can be as high as 5.7%. Therefore, it is not difficult to understand that smoking affects brain activity.
Three. Smoking and disease
A large number of research data show that long-term smoking will lead to many diseases, including lung cancer, laryngeal cancer, oral cancer, coronary heart disease, cerebrovascular disease and so on. Many data prove that smokers die of 70% more diseases than non-smokers. Generally speaking, people who smoke 1 box of cigarettes a day live about five years less than non-smokers, and those who smoke two boxes of cigarettes a day live 8? Nine years.
Britain reported that 1/3 of the people who died of cancer in Britain was directly related to smoking, and lung cancer was very prominent. The cancer mortality rate of smokers is 25 times higher than that of non-smokers. Some people collect smoke, let most of it dissolve in acetone, and use this solution to smear the skin of mice. Results 44% developed into skin cancer. The control group was smokeless when applied with acetone solution, and there was no abnormality in mice.
Fourth, publicize the harm of smoking and advocate quitting smoking.
Smoking has been regarded as one of the main public health problems in the world today, and preventing the harm of smoking to health has become the unanimous voice of the whole world. The United Nations has designated April 7th as? World Health Day? World No Tobacco Day. Advocating smoking is harmful, and restricting or prohibiting smoking in public places should become public morality.
Facts have proved that smoking is not only harmful to health, but also brings great losses to the country. In recent years, China has generally carried out the propaganda that smoking is harmful to health and issued documents. These activities have played a persuasive role.
The relationship between smoking and health is a serious scientific problem. In order to achieve the goal of quitting smoking, we must first understand some information about the dangers of smoking and make it clear, so that quitting smoking can be successful on the basis of raising awareness.
Young students are the precious wealth of the motherland. In order to keep healthy, teenagers should quit smoking consciously.
Smoking is harmful to health composition 2 The harm of smoking is 1, which is harmful to health.
There are three big ones in the world? Black boy? These three diseases are cancer, heart disease and cerebrovascular disease (that is, cerebral hemorrhage or cerebral thrombosis, which can lead to stroke and paralysis). Smoking makes blood worse, blood thickens, blood vessels harden, and the inner diameter of blood vessels narrows, which generally reduces human immunity, which is the main cause of the above three diseases. Smoking will deepen the incidence of various cancers, and 89% of lung cancer patients are smokers. If you suffer from the above diseases, you will soon die and the light will last for many years. Such as various cancers and strokes, are extremely painful and difficult to recover, ruining the health and happiness of patients throughout their lives. In addition, the average life expectancy of smokers is 5 to 8 years shorter than that of non-smokers. About one third of smokers will not live to retirement age. Moreover, men who smoke for a long time will become the best candidates for impotence. Once they get sick, it's too late to regret.
Harm of smoking 2. Bring trouble to your family.
Smokers are seriously ill or terminally ill, whether death or delay may lead to ruin and happiness of the whole family. Ordinary smokers smoke at home, and their families also smoke passively, which will suffer. If there are pregnant women at home, the fetus will also suffer. Parents smoke at home, and children are more likely to smoke. Perhaps this is the beginning of children's poor academic performance, disorderly behavior and astray. This is also a disaster that delays children, which is very harmful!
The harm of smoking. waste of money
Smoking is addictive, the amount of smoking is increasing, and the cost of smoking is increasing. Over time, this has become a big expense. Money that could have been used in the right direction, such as increasing nutrition, buying clothes and education, has to be reduced or even given up.
Smoking is harmful to health composition 10 smoking is harmful to health composition 10 farmers, workers or poor people will cause greater economic pressure and physical damage, which will make things worse and worse.
The harm of smoking. Loss of freedom
People who are addicted to smoking are trapped by their own hands and feet, and they lose their freedom of choice. Before going out, he should take pains to check whether his cigarettes, lighters and change cigarettes are all available. Before going to a place, he should know whether this place is a no-smoking place, engage in some activities, and find a place where he can light cigarettes in time, so that he can feel at ease.
Control increases the smoker's anxiety and restraint, while reducing his freedom and choice. After all, smokers are reduced to cigarettes? Prisoner? Yes How great this intangible loss and substantial limitation is!
The harm of smoking. Lack of cultivation
With the continuous progress of society, people's understanding of the harmfulness and rudeness of smoking is also strengthening. Smokers are mostly people with low knowledge and social status, and the smoking behavior of the upper class in the civilized world has been difficult to establish. If people with social status can't live a clean and honest life, but appear in public as smokers, it will be self-destruction and self-degradation.
The harm of smoking. environmental pollution
Indoor smoking, scattered soot, air pollution, whoever is on the scene will suffer. Smoking outdoors, cigarette butts can be seen everywhere, destroying the cleanliness of the environment. So no matter where you smoke, it pollutes the environment and there is nothing to say.
This not only reduced the country's productivity, but also caused great mental and economic pain and burden to the families of the deceased.
The harm of smoking. curtail production
About one-third of long-term smokers die before retirement age, and the average life expectancy of smokers is 5 to 8 years shorter than that of non-smokers.
The harm of smoking. It's on fire.
Smoking is one of the important causes of man-made fires. Cigarette butts falling to the ground will lead to house burning, factory explosion and forest fire, resulting in heavy losses of life, property and natural resources, which should be avoided. As long as you don't smoke, you can avoid many fires.
The harm of smoking. Destroy resources
Many land planted with tobacco cannot be used for other purposes at the same time, which also leads to the reduction of other agricultural products. Cigarette packaging and tobacco drying need wood. Cutting down forests for their use not only wastes resources, but also aggravates soil erosion in the upper reaches of rivers, destroys the whole environment and deepens the degree of drought and flood disasters.
The harm of smoking 10, corrupting the atmosphere.
Alcohol and tobacco are in power, people are addicted to money, the good atmosphere of society is destroyed, and the immoral behavior of society is encouraged. Is this a blessing on earth?
Generally speaking, smokers have little or no knowledge about the harm of smoking. If they want to keep the smoking habit that they can't quit or don't want to quit, they won't discuss the harm of smoking in depth. Only when smokers take a step forward in their understanding of the dangers of smoking will they have the idea of quitting smoking and finally embark on the road to success.
Smoking is harmful to health. It is our ideal to create a smoke-free environment and live a healthy and beautiful life. ? Smoking is harmful to health? It is widely spread in this century, and everyone knows that smoking is very harmful to our health. I think most of my classmates' fathers have the bad habit of smoking. Students may all want to get rid of this foggy environment, but we haven't got rid of it, and maybe we will get deeper and deeper! Therefore, students should advise their loved ones to stay away from harm!
We often hear people say? A cigarette after dinner makes you happy like a fairy? But this is not the case. The disadvantages of smoking are like countless stars, what's more, many people like smoking. There are three dangerous chemicals in tobacco: tar, nicotine and carbon monoxide. Tar is a mixture of several substances, which will be concentrated into viscous substances in the lungs; Nicotine is an addictive drug, which is absorbed by the lungs and mainly acts on the nervous system. Carbon monoxide reduces the ability of red blood cells to deliver oxygen to the whole body. In fact, tobacco is also a kind of drug, but it is not so violent and the country has not banned it. Dear uncles and aunts, have you ever thought about the consequences when you smoke? Smoking not only poses a threat to your health, but also does great harm to people who smoke passively around you. Like poison, these cigarette butts are slowly approaching us, which also poses a great threat to our life and work. If you are in the smog every day, your body will become weaker and weaker, and diseases will always infringe on you and even endanger your life. Horribly, a person who smokes/kloc-0.5 to 20 cigarettes a day has a higher risk of lung cancer, oral cancer or laryngeal cancer than a non-smoker/kloc-0.4 times. The risk of dying from esophageal cancer is four times higher than that of non-smokers. The possibility of dying from bladder cancer is doubled; The risk of dying of heart disease is twice as high. Smoking is the main cause of chronic bronchitis and emphysema, and chronic lung disease itself will increase the risk of pneumonia and heart disease, and smoking will also increase the risk of hypertension. After listening to this thrilling description, do you feel that the danger is slowly approaching you? Do you feel your moan of pain? Think about it, what can smoking bring you besides harm? Making feuds with your family because of smoking? So advise those friends who are addicted to smoking, think about the harm of smoking and quit smoking in time!
In order to stop more and more people from smoking, it is not enough to rely on one person's strength. We should all unite to get rid of this bad habit and harm.