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| Contents | ||
| Tobacco
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Tobacco plants | ||||||||||||
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N. acuminata N. alata N. attenuata N. clevelandii N. excelsior N. exigua N. forgetiana N. glutinosa N. kawakamii N. knightiana N. langsdorffii N. obtusifolia N. tabacum |
Tobacco (Nicotiana tabacum L.) is a broad-leafed plant of the nightshade family, indigenous to North and South America, whose dried and cured leaves are often smoked (see tobacco smoking) in the form of a cigar or cigarette, or in a smoking pipeThis article describes a pipe used for smoking tobacco. For other uses of the word, see pipe. A smoking pipe is a device used for smoking tobacco. The smoking pipe typically consists of a small chamber (the bowl) for the combustion of tobacco and a thin s, or in a water pipecopper water pipes used in a radiator heating system. Water pipes are tubes, frequently made of polyvinyl chloride or copper, that carry pressurized fresh water to buildings. For many centuries, lead was the favored material for water pipes, due to its ma or a hookahCaterpillar using a hookah An illustration to Alice's Adventures in Wonderland by Lewis Carroll A hookah or narghile ( Persian nrgile < nrgil "coconut", itself borrowed from Sanksrit nrikera is an Middle Eastern water pipe. It is also known as a shisha (. Tobacco is also chewed, "dipped" (placed between the cheek and gum), and consumed as finely powdered snuff tobacco, which is sniffed into the nose. The word "tobacco" is an Anglicization of the SpanishThis article is about the international language known as Spanish. For other languages spoken in Spain see Languages of Spain Spanish is an Iberian Romance language, and the third or fourth most spoken language in the world. It is spoken as a first langua word "tabaco", whose roots are unclear; it is thought to derive from the Native AmericanNative Americans (also Indians Aboriginal Peoples American Indians First Nations Alaskan Natives or Indigenous Peoples of America are the indigenous inhabitants of Americas prior to the European colonization, and their modern descendants. This term compri word "tabago" a y-shaped pipe used in sniffing tobacco powder.
Tobacco contains nicotineNicotine is an organic compound, an alkaloid found naturally throughout the tobacco plant, with a high concentration in the leaves. It constitutes 0. 3 to 5% of the plant by dry weight. The biosynthesis takes place in the roots and it is accumalated in th, a stimulantA stimulant is a drug which increases the activity of the sympathetic nervous system and produces a sense of euphoria or awakeness. Stimulants can be used as recreational drugs, or therapeutically to increase alertness; they are also used and sometimes ab that can form strong physical and psychological dependence. Most researchers consider this to amount to addictionAddiction is an uncontrollable compulsion to repeat a behavior regardless of its negative consequences. A person who is addicted is sometimes called an addict . Many drugs or behaviors can precipitate a pattern of conditions recognized as addiction, which: according to the U.S. Centers for Disease Control and Prevention (CDC), "nicotine is a very addictive drug."
All of the mentioned means of consuming tobacco result in the absorption of nicotine in varying amounts into the user's bloodstream. Absorption quantity and speed seem to have a direct relationship with how strong a dependence might be created. Nicotine is a highly effective insecticide and is acutely poisonous to humans in large doses. Additional hazards of tobacco use include carcinogenic compounds in tobacco and tobacco smoke. Many jurisdictions have enacted smoking bans in an effort to mimimize possible damage to public health due to tobacco smoking.