Tar: When smoke is inhaled into the human body, more than 75% of the tar will adhere to the mucosa of the trachea and alveoli, causing the cilia on the trachea and bronchus mucosa to be unable to work normally. In the long run, if the tracheobronchial mucosa is stimulated by inflammation for a long time, it may occur Squamous metaplasia increases the risk of mutation into cancer.
Gas: Smoke contains benzene, formaldehyde, hydrazine, N-nitrosodimethylamine and other carcinogens. Among them, benzene is a highly carcinogen and can increase the possibility of bladder cancer, leukemia, lung cancer and other cancers. Moreover, there are harmful gases such as carbon monoxide and nitrogen dioxide in the gas, which may cause damage to the cardiovascular, cerebrovascular and respiratory systems and induce chronic diseases such as myocardial infarction.
Radioactive substances: Along with smoke, radioactive isotopes enter the human body: polonium 210 and lead 210. Although their content in a cigarette is very small, after burning, polonium 210 and lead 210 are attached to the alveoli along with tiny particles in the smoke, and are continuously radiated and decayed in the human body. Every time you smoke, they are accumulated, bringing additional cancer risk.