Tobacco smoke contains over 60 cancer causing chemicals, known as carcinogens. When smoke is inhaled through the mouth, throat and into the lungs, the carcinogens in the smoke are absorbed through the lining of the lungs into the bloodstream. They are then distributed by the blood and the lymphatic system throughout the body causing cells in particular organs to multiply uncontrollably; that is, to become cancerous.
An example of one of the carcinogenic substances in tobacco smoke is Benzo(a)pyrene, which damages the all important P53 gene. This gene plays a vital role in maintaining the body's health by preventing uncontrolled cell multiplication.
This website will tell us about some cancers that causes by smoking, just click here http://www.cancercouncil.com.au/31903/reduce-risks/smoking-reduce-risks/tobacco-facts/how-much-cancer-does-smoking-cause/?pp=31903 for more information.
No comments :
Post a Comment