Smoking, Biology

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SMOKING -

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

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