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Tabacco effect on human body
Toxic ingredients in cigarette smoke travel throughout the body, causing damage in several different ways.
Nicotine reaches the brain within 10 seconds after smoke isinhaled. It has been found in every part of the body and in breast milk.
Carbon monoxide binds to hemoglobin in red blood cells, preventing affected cells from carrying a full load of oxygen.Cancer-causing agents (carcinogens) in tobacco smoke damage important genes that control the growth of cells, causing them to grow abnormally or to reproduce too rapidly.
The carcinogen benzo(a)pyrenebinds to cells in the airways and major organs of smokers.
Smoking affects the function of the immune system and may increase the risk for respiratory and other infections.
There are several likelyways that cigarette smoke does its damage. One is oxidative stress that mutates DNA, promotes atherosclerosis, and leads to chronic lung injury. Oxidative stress is thought to be the general mechanismbehind the aging process, contributing to the development of cancer, cardiovascular disease, and COPD.
The body produces antioxidants to help repair damaged cells. Smokers have lower levels ofantioxidants in their blood than do nonsmokers.
Smoking is associated with higher levels of chronic inflammation, another damaging process that may result in oxidative stress.
Do you have any ideawhich smoking-related disease is the number one cause of death among smokers? If you're thinking it's lung cancer or COPD/emphysema, you're wrong. While both of these smoking-related diseases do claim alot of lives, it is heart disease that that holds the top slot in the list of diseases that kill smokers.
Heart disease is the leading cause of death in the United States today, and the leadingcause of death among smokers. And, on a global level, researchers report that there were 1,690,000 premature deaths from cardiovascular disease among smokers in the year 2000. In contrast, there were...