Smoking is more harmful and can cause lesions in the respiratory system, cardiovascular system, and oral cavity.
1. Respiratory system: smoking will stimulate the respiratory system mucosal cells, causing chronic inflammation, long-term smoking will also make the respiratory tract structural changes, resulting in reduced ventilation of the lungs, which may lead to severe dyspnea, long-term smoking is prone to induce lung cancer.
2. Cardiovascular system: long-term smoking will accelerate the speed of cardiovascular atherosclerosis, accelerate the formation of plaque in the inner wall of the arteries.
3. Oral cavity: long-term smoking will destroy the normal structure of the teeth, resulting in yellowing and blackening of the teeth, and oral odor.
Cigarettes contain nicotine, tar, carbon monoxide, butane, etc., of which nicotine can be addictive or dependent, difficult to quit; tar is the product of aerobic combustion of organic substances, including hydrocarbons and hydrocarbon oxides, sulfides, nitrogen compounds, including heavy metals such as chromium, cadmium, arsenic, etc., are carcinogenic, and it is recommended to quit smoking as early as possible to avoid increasing the risk of disease.