Cigarettes contain more than 65,438+0,400 ingredients. There are more than 40 kinds of carcinogens in the smoke produced by smoking, and there are more than 10 kinds of substances that can promote the development of cancer, among which nicotine, carbon monoxide tar and other metal compounds are the most harmful to human body. The nicotine in cigarettes is enough to kill a mouse. The binding capacity of a large amount of carbon monoxide and hemoglobin in cigarette smoke is 240-300 times greater than that of oxygen. It seriously weakens the oxygen carrying capacity of red blood cells. Therefore, smoking accelerates blood coagulation and easily causes cardiovascular diseases such as myocardial infarction, stroke and myocardial hypoxia. What's more, smokers also seriously hinder the health of others. The results show that smokers do more harm to others than to themselves. Relevant medical research shows that smoking is a behavioral risk factor for cardiovascular and cerebrovascular diseases, cancer, chronic obstructive pulmonary disease and other diseases. Smoking has become the second largest global killer after hypertension. According to statistics, the incidence of lung cancer, laryngeal cancer, coronary heart disease, circulatory system and trachea are higher than those of non-smokers by 10-20 times, 6- 10 times, 2-3 times, 3 times and 2-8 times respectively.
Never take the first bite. Drugs sometimes put on a special coat. Some people with ulterior motives will say that this is not a drug, but something else, such as stimulants, stimulants, or they will tell you that this drug is a new product and will not be addictive. Students should at least have the ability to identify these drugs. I can tell them that all drugs are addictive and will inevitably cause harm to the body, otherwise the country will not. Some drug dealers sometimes provide drugs for free in the first few times for the benefit, so that after you become addicted to drugs, he continues to sell drugs. Today, I call on my classmates to refuse drugs from the first bite, and never even smoke cigarettes from strangers. I personally suggest that you don't even smoke. Heroin, commonly known as white powder and white flour, is called the white devil because of its strongest addiction and greatest harm. Heroin will bring a strong euphoria at first, but it will disappear after a few hours. After stopping the drug, there will be "withdrawal syndrome" such as tears, runny nose, dilated pupils, vertical hair, sweating, diarrhea, yawning, mild blood pressure increase, increased heart rate, fever and insomnia. When the symptoms reach the peak, goose bumps appear on the skin, just like the chicken skin after plucking, commonly known as "cold turkey". I hope to return to that semi-anesthetic state. Therefore, taking drugs again and again can not extricate themselves, forming a dependence on heroin. After taking drugs for a long time, the pleasure is decreasing. Therefore, in order to achieve the same stimulation intensity as before, drug addicts must increase the dose.
Drunkenness can harm health and damage the liver: fat accumulation in the liver causes fatty liver. Gastric ulcer: it can cause gastric bleeding and endanger life; Nervous system injury: such as peripheral neuropathy. Therefore, children can't drink, and it is easy to become stupid. Cerebral cortex atrophy: It is reported that some chronic alcoholics have cerebral cortex atrophy, and some patients have signs of mental decline. Alcohol fetal syndrome: The metabolism and excretion of alcohol in the fetus are slow, which causes various injuries to the developing fetus, including fetal malformation, stillbirth, growth retardation and behavioral defects.
Therefore, to choose a healthy lifestyle, we must start from me, from now on: no smoking, no drinking; Refuse drugs.
So the answer is: when tobacco burns, the smoke contains many harmful substances, such as nicotine and tar, which can not only induce various respiratory diseases, but also induce lung cancer. Drug abuse is more harmful to the human body. Taking drugs will damage people's nervous system, reduce people's immune function, cause cardiopulmonary injury, respiratory paralysis, and even death. Drinking alcohol can damage people's digestive system, such as gastritis, gastric ulcer, alcoholic hepatitis and even damage. In severe cases, it will cause paralysis of the whole brain and lead to death. Teenagers are in the period of growth and development, and smoking, drug abuse and drinking are more harmful. Therefore, to develop good living habits and choose a healthy lifestyle, we should start from me, from now on: no smoking or drinking; Refuse drugs.