The main substances that smoke is harmful to the human body are:

Tobacco itself contains arsenic, pesticides and other deadly ingredients, long-term smoking is chronic suicide, smoking will emit some carcinogens in the smoke, so passive smokers inhale more harmful substances than smokers themselves. After smoking, the smell of smoke and harmful particles will remain on the smoker's hair, ** and clothing, and the furniture around the smoker will also be infected by cigarette poison.

Nicotine, acrolein, hydrocyanic acid, cigarette tar, carbon monoxide, these substances are harmful to the body.

Smoking is harmful but not beneficial, not only affecting the health and life of smokers, but also polluting the air and endangering others.

1. It can mainly cause some lung diseases, cigarettes contain a variety of toxic chemicals, mainly tar, nicotine, carbon monoxide, dioxins, etc., which can damage the mouth, trachea and lungs, and can cause chronic bronchitis, emphysema, pulmonary interstitial fibrosis and other diseases.

2. Cause cardiovascular-related diseases, smoking can constrict coronary arteries and cause myocardial infarction. At the same time, it can cause increased heart rate, increased cardiac load, and lead to the occurrence of cardiovascular and cerebrovascular diseases.

3. Smoking can also cause cancer, the most common is lung cancer, bladder cancer, esophageal cancer, etc. Smoking can also cause osteoporosis, which can lead to early menopause. Men lose the ability to have sex and have children, and smoking in pregnant women can lead to premature birth of the fetus.

Smoking can also affect people's attention, affect people's intelligence and memory, and seriously affect the efficiency of work and study, so it is recommended to quit smoking as soon as possible.

A person who smokes 15 to 20 cigarettes a day is 14 times more likely to die from lung, oral or throat cancer than a non-smoker. They are 4 times more likely to die from esophageal cancer than non-smokers; Let's talk about the harm of smoking to various organs

1. Lung:

The fine hairs in the lungs that line the airways usually remove foreign objects from the lung tissue. In addition to causing cancer, the chemicals in tobacco smoke will gradually destroy some villi and increase mucus secretion, so that chronic diseases occur in the lungs and they are susceptible to bronchitis. Obviously, the "smoker's cough" is due to the impaired mechanical efficiency of the lungs for cleaning, and therefore the amount of sputum increases.

2. Bladder:

Due to long-term smoking, the smoke that comes out of the bladder is black, so there is a problem with the bladder.

3. Esophagus:

Most smokers like to swallow a certain amount of smoke, so the digestive tract (especially the esophagus and pharynx) is at risk of cancer.

4. Oral cavity and larynx

Smoke from smoke, especially the tar it contains, is a carcinogen – that is, it can cause cancer in the tissues it touches, so it can develop cancer anywhere in the smoker's airway.

5. Heart and arteries:

Nicotine contained in cigarettes can make the heart beat faster and blood pressure higher, and tobacco smoke may be due to the carbon monoxide content, which seems to promote atherotic accumulation, and this condition is a cause of many heart diseases, and people who smoke a lot of cigarettes have a much greater chance of dying from a heart attack than non-smokers.