As we all know, smoking is harmful to health. A research result of a foreign psychological research institution shows that the intelligence efficiency of smokers is lower than that of non-smokers 10.6%. Different cigarettes release different chemicals when they are lit, but the main chemicals are tar and carbon monoxide. And drinking alcohol is also harmful. The following is the harm I brought to college students' smoking. Let's have a look.

The harm of college students' smoking

1. Lung diseases: 38 kinds of toxic chemicals are released when cigarettes are burned, among which tar, carbon monoxide, nicotine, dioxins and irritating smoke are harmful components. Tar is harmful to the mouth, throat, trachea and lungs. Tar in tobacco smoke is deposited on lung villi, which destroys the function of villi, increases phlegm and causes chronic bronchial diseases, such as tracheitis, emphysema, pulmonary heart disease and lung cancer. According to statistics, the proportion of smokers suffering from lung disease after 60 years old is 74%, while the proportion of non-smokers suffering from lung disease after 60 years old is only 4%, which is a shocking figure.

Second, cardiovascular diseases: carbon monoxide in cigarettes reduces the oxygen content in the blood, causing hypertension and other related diseases. Smoking will contract coronary artery, reduce or block supply, and lead to myocardial infarction. Smoking can increase adrenaline, make the heart beat faster, increase the heart load, affect blood circulation, and lead to more than 20 diseases such as cardiovascular and cerebrovascular diseases, diabetes, sudden death syndrome, decreased respiratory function and stroke.

Third, smoking causes cancer: the study found that smoking is the fastest and richest way to produce free radicals. Every cigarette will produce at least 654.38 million+free radicals, leading to cancer and many chronic diseases.

What are the advantages and disadvantages of drinking?

In recent years, scientists have found through a large number of investigations that people who drink regularly and moderately are far less likely to suffer from cardiovascular diseases than those who never drink. Therefore, it is concluded that moderate drinking can prevent cardiovascular diseases, especially coronary heart disease and atherosclerosis. Why can moderate drinking reduce the incidence of coronary heart disease and atherosclerosis?

Someone said:? A cigarette after a meal is better than a living fairy. ? So some people, especially some young people, often indulge in? Smoking? In the middle. As everyone knows, just as they were having fun, all kinds of poisons in tobacco launched a cruel attack on them.

According to the analysis, tobacco contains about 1200 compounds, most of which are toxic to human body, especially nicotine, which is particularly harmful. Nicotine in one cigarette can poison a mouse, and nicotine in 20 cigarettes can poison a cow. If a person smokes 20 to 25 cigarettes a day, he will inhale 50 to 70 milligrams of nicotine, which can cause death. It is only because they are gradually inhaled that the human body has a certain detoxification ability and is spared.

Other hazards of smoking

Tobacco contains many carcinogens, in addition, there are many carcinogens and ciliated toxins that can reduce the body's ability to expel foreign bodies. These poisons attach to the tiny particles of cigarette smoke, reach the alveoli, and deposit there, strengthening each other. As a result, the carcinogenic effect is greatly enhanced. People who smoke more than 10 cigarettes a day have a lung cancer mortality rate 2.5 times that of non-smokers. In addition, smoking can also cause laryngeal cancer, oral cancer, nasopharyngeal cancer, esophageal cancer, pancreatic cancer, bladder cancer and so on.

Smoking will aggravate cardiovascular diseases, accelerate atherosclerosis and thrombosis, lead to arrhythmia and even sudden death. Some scholars have found that the sudden death of smokers due to coronary heart disease is more than four times higher than that of non-smokers.

Smoking can damage the nervous system, make people's memory decline and age prematurely.

Smoking can damage the respiratory system. Smokers often cough and expectorate all the year round, and are prone to respiratory diseases such as bronchitis, emphysema and bronchiectasis.

Smokers are prone to gastric ulcer, because nicotine in cigarette smoke will destroy the acid-base balance of digestive tract.

In a word, smoking is very harmful to health. According to a report of the World Health Organization, at least 654.38+0 million people worldwide die prematurely every year because of smoking. The report also provides some surprising figures: 90% of lung cancer patients and13 of all kinds of cancer patients are caused by smoking, 75% of chronic bronchitis patients and 25% of heart disease patients are caused by smoking.

Smoking not only harms yourself, but also harms others and forces them? Passive smoking? . In fact, all kinds of diseases that smoking may cause may happen to passive smokers.