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目前所知,烟草及其燃烧产物中,至少含有750种化学成份。其中主要为焦油、尼古丁、一氧化碳、氰氢酸和丙烯醛等。这些化学成份对人体十分有害。尼古丁作用于交感神经、付交感神经节及肾上腺,使之释放儿茶酚胺,引起心率增快。焦油能引起支气管粘膜上皮细胞增生与变异,有发生癌变的趋向。一氧化碳与血红蛋白的亲加力比氧大200～300倍,它不但从血红蛋白取代氧,且使氧离曲线左移,妨碍氧的释放。吸烟者血液中的碳氧血红蛋
As far as is known, tobacco and its products contain at least 750 chemical constituents. Mainly tar, nicotine, carbon monoxide, hydrogen cyanide and acrolein. These chemical ingredients are very harmful to humans. Nicotine acts on the sympathetic nerve, pay sympathetic ganglia and adrenal glands, so that the release of catecholamines, causing heart rate faster. Tar can cause bronchial epithelial cell proliferation and mutation, there is a trend of carcinogenesis. Carbon monoxide and hemoglobin progeny than 200 to 300 times larger than oxygen, it not only from hemoglobin to replace oxygen, and leaving the oxygen from the curve to the left, obstructing the release of oxygen. Smoker’s blood in the carboxyhemoglobin