Smoking cigarettes is a harmful and deadly habit that has an extremely negative effect on the human body. The smoke that a smoker sucks in contains about 200 toxic chemical compounds, at the same time, some of them are narcotic, that is, they force a person to smoke again and again and poison themselves and others.
The cigarette is equipped with everything necessary for the destruction of a person no worse than a soldier of a modern army. Her weaponry is not limited to nicotine alone, although that would be enough to be considered a professional killer.
Tobacco smoke inhaled by a smoker has too high a temperature - about 60 degrees, this leads to irritation of the mucous membrane of the nose and mouth, its inflammation and erosion.
Together with the smoke, the smoker always draws in a portion of air, which is much colder, the temperature drop in the oral cavity causes destruction of the enamel of the teeth. In addition, resins, which are contained in large quantities in the smoke, settle on the teeth. The smoke irritates the salivary glands, and the abundant saliva immediately absorbs such harmful substances from the smoke as hydrogen sulfide and aniline. Instead of with saliva, these substances enter the esophagus, stomach and other parts of the digestive system, irritating the mucous membranes, which ultimately leads to ulcers and gastritis.
The main blow when inhaling tobacco smoke is taken by the respiratory tract. The smoke irritates the mucous membranes of the trachea, bronchi, which leads to chronic cough and bronchitis, frequent colds. Finally, the smoke settles on the huge surface of the lungs (about 100 square meters), which is formed by many tiny alveoli. From the lungs, harmful substances enter the circulatory system and are carried throughout the body. During normal breathing, the blood is enriched with oxygen, and when smoking, part of the oxygen is replaced by carbon monoxide, which removes a large percentage of hemoglobin from the breathing process. Therefore, when smoking, oxygen starvation occurs in all tissues of the body. This can be clearly seen if you look at the skin of a heavy smoker, which has a bluish tint from a constant lack of oxygen.
The neurons of the brain are most sensitive to a lack of oxygen, therefore, smokers' intellectual abilities decrease, this is especially noticeable in the elderly - smokers over 60 years old lose their intellectual abilities 5 times faster than their non-smokers of the same age.
The composition of tobacco smoke contains an extremely dangerous poison - hydrocyanic acid. Despite the fact that its dose in a cigarette is small, it still inflicts a terrible blow on the human nervous system.
But the main negative effect of smoking is nicotine. It is a very toxic poison, a lethal dose of which is contained in just one pack of cigarettes. That is, the average smoker uses a lethal dose of nicotine every day and does not die only due to the fact that nicotine is quickly excreted by the kidneys and does not have time to accumulate in the body. Once in the body, nicotine tones up the nervous system in the first minutes, creating an illusion of vigor and concentration in a person after smoking, but soon all systems are suppressed, and a new dose of nicotine is required to feel good. Thus, nicotine addiction arises.