According to the Chinese Journal of Tuberculosis and Respiratory found that smoking is harmful to health, the cigarette contains smoke tar and nicotine, these harmful substances can cause damage to the human respiratory epithelial cells, which may lead to chronic bronchitis, chronic obstructive pulmonary disease, lung cancer incidence increased, but also damage to cardiovascular and cerebral vascular endothelial cells, the accumulation of a long period of time can lead to blood vessel stenosis and sclerosis.
Cigarettes have a lot of smoke tar and nicotine, smoking will cause the human body adrenal hormones and norepinephrine hormone metabolism enhancement, so that the heart beat very quickly, blood pressure rises to increase the heart load. Nicotine and smoke tar will increase the incidence of lung cancer. It also causes damage to bronchial epithelial cells, leading to chronic bronchitis, emphysema, and chronic obstructive pulmonary disease.
Nicotine causes vasoconstriction and spasm, allowing blood friction resistance to expand, damaging the walls of blood vessels, causing platelets to be released and clustered, elevating the viscosity of the blood, and causing atherosclerosis in the heart, brain, kidneys, and other systemic human organs.
In addition, smoking can cause sudden death. Part of the patients with coronary atherosclerosis smoking will also cause myocardial infarction, the incidence of stroke increased. Therefore, in daily life, we must keep quit smoking.