Is smoking too much harmful to your health? Thank you, everyone.

Tobacco contains benzene and tar, and there are many radioactive substances that can cause cancer. Research shows that 90% of lung cancer patients are caused by smoking. Previous studies have proved that at least 60% of male bladder cancer cases in western countries are caused by smoking, as well as oral cancer and laryngeal cancer. In the past, tobacco products were at greater risk of cancer because they contained mold. Smoking can cause lung, cardiovascular and gastrointestinal diseases and various tumors, aggravate diabetes, and cause common diseases such as Alzheimer's disease. Men who smoke are six times more likely to be infertile than non-smokers. Smoking will not only reduce the number of sperm, but also lead to abnormal sperm and impotence. Smoking will reduce the level of blood stimulating factors, which will damage blood vessels and connective tissues essential for maintaining skin elasticity, make skin dry and slack, thus creating an obvious "smoking face" and destroying the beauty of youth and beauty. Women who smoke are three times more likely to develop wrinkles than non-smokers. Compared with non-smoking women, smoking women are 2.7 times more likely to suffer from infertility than non-smoking women. Smoking by mothers will not only affect their own health, but also endanger the next generation, such as poor physical fitness, light weight and high neonatal mortality; Babies are twice as likely to suffer from congenital heart disease as ordinary people. Smoking may also aggravate gastric ulcer and reduce wound healing. Smoking in women can also lead to amenorrhea and increase the risk of rickets. Studies show that half of smokers die of diseases in middle age or old age. Smoking is harmful to people's health, especially to teenagers. According to the research of medical scientists, teenagers are in the period of growth and development, and their physiological systems and organs are not yet mature. Their resistance to harmful factors in the external environment is weaker than that of adults, and they are easy to absorb poisons and damage the normal growth of their bodies. Smoking damages the brain and affects intelligence. The content of carbon monoxide in tobacco smoke is very high. When inhaled into human body, it will combine with hemoglobin in blood to form carboxyhemoglobin, so that hemoglobin can't combine with oxygen to form oxygenated hemoglobin, thus losing its oxygen-carrying function. In addition, the binding force of carbon monoxide to hemoglobin is 260 times that of oxygen, and the speed at which carbon monoxide is separated from carboxyhemoglobin is much slower than that of oxygen from oxygenated hemoglobin. Because the human brain needs a lot of oxygen, it is very sensitive to hypoxia. If you smoke too much, you will feel distracted and even have a headache and dizziness. Over time, the brain will be damaged, slow thinking and memory will be damaged. In this way, it will inevitably affect study and work, and make students' academic performance decline. Nicotine in tobacco is a neurotoxin, which mainly harms people's nervous system. Some smokers subjectively think that smoking can relieve fatigue and refresh their minds. This is a temporary nervous system excitement, which is actually a euphoria caused by nicotine. After the excitement, the nervous system immediately inhibited. Therefore, the sensitivity and accuracy of neuromuscular response decreased after smoking. The research results of a foreign psychological research institution show that the intelligence efficiency of smokers is lower than that of non-smokers 10.6%.

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