Smoking, SMOKIN G - It means to draw tobacco smoke into the mouth or lungs &, Biology

Smoking, Biology

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SMOKING -

It means to draw tobacco smoke into the mouth or lungs & exhale it via mouth, nostrils or both.
Tobacco is obtained from Nicotiana tobacum & Nicotiana rustica of solanaceae family, name was given after Jean Nicot.
Tobacco is used for smoking, chewing & snuffing.
It's main toxic component is nicotine.
Other harmful components are CO, benzpyrene and tar.
Tar contains ammonia, formaledehyde aceteldehyde, HCN, NO₂, NO₃ & acrolein.
Nicotine stimulates conduction of nerve impulses, causes alertness, relaxes muscles, increases heart beat & B.P., retard foetal growth.

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Smoking, Biology

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