How much do you know about the dangers of smoking?

Most people in life know that smoking is harmful. How much do we know about the harms of smoking? We can see people smoking everywhere. Smoking causes considerable damage to the cardiopulmonary function. There are many public places with no-smoking slogans posted to remind people who like to smoke to stay away from cigarettes, but there are still many people who smoke unscrupulously. Today I will talk about the dangers of smoking. Friends who are still smoking, please come and read my introduction. I hope it will be helpful to you.

It is a well-known fact that smoking is harmful to health. . Different cigarettes release different chemicals when they are lit, but the main ones are chemicals such as tar and carbon monoxide. The substances harmful to the human body produced after a cigarette is lit can be roughly divided into six categories: (1) aldehydes, nitrides, and olefins, which are irritants to the respiratory tract. (2) Nicotine can stimulate the sympathetic nerves and cause damage to the vascular endothelium. (3) Amines, cyanides and heavy metals, all of which are toxic substances. (4) Benzopyrene, arsenic, cadmium, methylhydrazine, aminophenol and other radioactive substances. All these substances are carcinogenic. (5) Phenolic compounds and formaldehyde, etc. These substances have the effect of accelerating carcinogenesis. (6) Carbon monoxide can reduce the ability of red blood cells to transport oxygen throughout the body. 1. Carcinogenic effect It is generally recognized that smoking causes cancer. Epidemiological surveys have shown that smoking is one of the important risk factors for lung cancer, especially squamous cell carcinoma and small cell undifferentiated carcinoma. The risk of lung cancer for smokers is 13 times that of non-smokers. If smokers smoke more than 35 cigarettes a day, the risk is 45 times higher than that of non-smokers. The lung cancer mortality rate among smokers is 10 to 13 times higher than that among non-smokers. About 85% of lung cancer deaths are caused by smoking.

2. Impact on the cardiovascular and cerebrovascular diseases Many studies have shown that smoking is a major risk factor for many cardiovascular and cerebrovascular diseases. The incidence of coronary heart disease, hypertension, cerebrovascular disease and peripheral vascular disease in smokers is significantly increased. Statistics show that 75% of patients with coronary heart disease and hypertension have a history of smoking.

The above content is an introduction to how much I know about the harm of smoking. Many of my friends are smoking. They also know that smoking is bad for the body, but they still can't control smoking. Smoking is a habit. Some people have been doing it for decades. It is quite difficult to quit. This requires one's own control and the help of family members. You can buy some snacks to replace the smoking habit.