What are the health hazards of adolescent smoking?

Smoking is very harmful to the health of developing teenagers, and has a certain degree of influence on bone development, nervous system, respiratory system and reproductive system. Because of the imperfect development, imperfect function and weak resistance of various organs in adolescence, the harm of smoking is even greater than that of adults. In addition, because the respiratory tract of teenagers is narrower than that of adults, and the cilia of respiratory mucosa are underdeveloped, smoking will damage the respiratory tract and produce inflammation, increase the resistance of breathing, reduce vital capacity, and affect the development of teenagers' thorax, thus affecting their all-round development.

Tobacco contains a lot of nicotine, which is toxic to the brain, causing memory loss, listlessness and academic performance decline. The survey found that the academic performance of smokers was lower than that of non-smokers In addition, teenagers are in a critical period of sexual development, and smoking reduces testosterone secretion, leading to sperm reduction and deformity; Girls have delayed menarche and menstrual disorders. Smoking among teenagers will also advance the onset age of coronary heart disease, hypertension and tumors. Relevant data show that the younger you smoke, the more serious the harm to your health. /kloc-people who started smoking at the age of 0/8 are more serious than those who started smoking at the age of 0/8.

The mortality rate of smokers after the age of 55 is 55%, which is 1 times that of non-smokers.

According to oncologists, when smoking, most smoke enters the lungs through trachea and bronchus, and a small part enters the digestive tract with saliva. Some harmful substances in smoke remain in the lungs, and some enter the blood circulation and flow to the whole body. Under the synergistic effect of carcinogens and cancer promoters, normal cells are damaged and become cancer cells. The younger you are, the more sensitive human cells are to carcinogens, and the greater the harm of smoking. Teenagers are prone to cancer, which is directly related to factors that promote cancer, such as premature smoking and excessive smoking.