Smoking can lead to short and irregular cilia of bronchial epithelial cells, dyskinesia, reduced local resistance and susceptibility to infection. Smoking can cause lung cancer. 90% of the total mortality rate is caused by smoking. The initial symptoms will not be found until the cancer cells spread to blood vessels and other organs.
Smoking can also cause emphysema, and toxic substances accumulated in the bronchi of the lungs will hinder the normal exhalation of the air inhaled by the human body, make lung cells expand or rupture, and cause patients to have difficulty breathing.
2. The damage of smoking to the stomach
People with gastrointestinal diseases, smoking is enough to make gastrointestinal diseases worse. People with gastric ulcer or duodenal ulcer will slow down the healing of ulcer and even become chronic diseases.
Smoking can stimulate the nervous system, accelerate the secretion of saliva and gastric juice, make the gastrointestinal tract often tense, and lead to the loss of appetite of smokers. In addition, nicotine can also contract gastrointestinal mucosal blood vessels and reduce appetite.
3. The damage of smoking to the liver
Smoking will increase the burden on the liver. Regular smoking will affect the lipid metabolism of the liver, increase blood lipid, decrease benign cholesterol and increase malignant cholesterol. This has caused the burden of detoxification function of the liver to increase.
4. The damage of smoking to the intestine
Smoking can lead to colon cancer. The risk of this kind of cancer is directly proportional to the amount of smoking. Research shows that although quitting smoking can reduce the risk of other diseases such as heart disease and lung cancer, the risk of colon cancer is still high.