2011年5月6日星期五

The dangers of smoking

Harmful substances in smoke

    
Health risks of smoking is well known fact. . The cigarette ignited the different chemicals released when different, but mainly the number of chemicals such as tar and carbon monoxide. Lit cigarette produces harmful substances can be divided into six categories:

    
(1) aldehydes, nitrides, olefin, these substances have a stimulating effect on the respiratory tract.

    
(2) nicotine category, can stimulate the sympathetic nerve, causing intimal damage.

    
(3) amine, cyanide and heavy metals, which are toxic substances.

    
(4) acrylic pyrene, arsenic, cadmium, methyl hydrazine, amino phenols, other radioactive substances. These substances are carcinogenic.

    
(5) phenolic compounds and formaldehyde, these substances have a role to accelerate carcinogenesis.

    
(6), carbon monoxide can reduce the red blood cells carry oxygen to the body to capacity.

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