Lung is one of the component of the respiratory system that also includes nose, throat, voice box and windpipe. The major function of the respiratory system is intake of oxygen and exhalation of carbon dioxide, a waste gas produced by the body. The lungs also help in removal of dust particles and germs that are trapped in mucus. The cigarette smoke causes harmful changes in lungs resulting in various lung diseases such as cardiovascular disease, cancers of the lung, larynx, oral cavity, and esophagus, chronic bronchitis, emphysema, chronic obstructive pulmonary disease. Tobacco smoke contains large quantities of toxic chemicals like tar which is a carcinogen. Nicotine is addictive and increases cholesterol levels in your body.
Nowadays it is most common that death rate of cardiovascular disease is due to smoking. Smoking can lead to Hardening of the arteries, a process which is developed when cholesterol and other fats deposit in the arteries. Smoking accelerates the hardening and narrowing process in your arteries followed by blood clot resulting in sudden death. Cardiovascular disease may occur depending on the blood vessels type that involved in fat deposition.
Bronchitis is actually an inflammation of the bronchial tubes leading to excessive secretions of mucus into the tubes. Due to the secretion, swelling occurs resulting in narrow or close off bronchial tubes. This disease shows a symptom of cough that occurs along with sputum production that lasts for at least 3 months or more.
Emphysema is also a disease of lung which is abnormal and permanent enlargement of the air spaces (alveoli). Emphysema also destroys the walls of these air spaces resulting in less total area within the lung where blood and air can come together, limiting the oxygen and carbon dioxide transfer.
Chronic obstructive pulmonary disease, or COPD, is a long-lasting obstruction of the air passage that occurs with chronic bronchitis, emphysema, or both. The common symptoms of COPD are breathlessness, or a ‘requirement for air’, excessive sputum production, and a chronic cough. However, COPD is commonly known as "smoker's cough". If the diseases is not diagnosed at right time may cause life threatening lung disease that may progressively lead to death.
Smoking leads to various types of cancers in the body. First to be listed is lung cancer by which major death rate are increased. Other cancers related to smoking are cancers of the oral cavity, pharynx, larynx, esophagus, lung and bladder. Cancer-causing agents (carcinogens) in tobacco smoke affect important genes that control the growth of cells. The combination of smoking and alcohol consumption causes laryngeal cancer
Tips and comments:
The people who smokes tabacco should understand the ill effects of smoking and various diseases caused by smoking. One should quit smoking to lead happy and healthy life. People who quit smoking can actually reverse some of the damage that already been carried out to their lungs. Even lung, heart and various cancerous diseases can be kept in control.
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