A plant, Nicotiana tabacum, consisting of cellulose, starches, proteins, sugars, alkaloids, hydrocarbons, phenols, fatty acids, isoprenoids, sterols, and a number of inorganic minerals, also found in many other plants. However, also contains nicotine, nomicotine, myosmine, and anabasine not found in other plants.
The dried leaves of the plant Nicotiana tabacum or related species, used in smoking and as snuff. Tobacco contains the stimulant but poisonous alkaloid nicotine, which enters the bloodstream during smoking. The volatile tarry material also released during smoking contains chemicals known to produce cancer in animals.
The leaf of several species of nicotiana, especially of the American plant Nicotiana tabacum. The smoking of tobacco is the most serious public-health hazard in the World. It causes about 83,000 deaths a year in England alone, and 60 million people worldwide.. The most frequent causes of death are lung cancer, chronic obstructive pulmonary disease (COPD) and coronary heart disease. It is also a major cause of disability and illness in the form of peripheral vascular disease. Also, smokers have more persistent or more severe colds, Crohn’s disease, influenza tuberculosis and asthma. They have worse symptoms than non-smokers for conditions such as chronic rhinitis, diabetic eye disease, hyperthyroidism, multiple sclerosis (MS) and optic neuritis. Smokers are less fertile than non-smokers and have a greater prevalence of impotence, erectile dysfunction and disease of the gums and teeth. Tobacco smoking is also a hazard to the FETUS if the mother smokes. It is estimated that nearly 450,000 people were admitted to hospital in the UK in 2006 with smoking-related disease. Half of long-term smokers will die prematurely because of their habit and half of those die before they are 70. Furthermore, passive smoking inhalation of other people’s tobacco smoke has been shown to be a health hazard to non-smokers.
A plant (scientific name Nicotiana tabacum) whose leaves are cultivated, dried, and adulterated for use in smoking, chewing, and snuffing. The use of tobacco creates more preventable disability and death than the use of any other commercially available product. The tobacco leaf contains nicotine, a highly addictive alkaloid, and numerous other chemicals. During its combustion, it releases thousands of hydrocarbons into the oral, digestive, and respiratory tract of the smoker. These substances have been linked to coronary and peripheral arterial disease, emphysema, chronic bronchitis, peptic ulcer disease, and cancers of the lungs, oral cavity, and gastrointestinal tract.
A plant that contains nicotine whose leaves can be used in a smokeless form such a snuff and chewing tobacco or by burning them and inhaling their smoke through puffing on cigarettes, cigars, or pipes.
The dried leaves of the NICOTIANA TABACUM plant are commonly known as tobacco and are used for smoking, chewing, or snuff by a vast number of people worldwide. The substance contains varying levels of nicotine as well as multiple cancer-causing compounds. The risk of cancer increases with the quantity of tobacco consumed and the duration of use. People who use tobacco are more likely to develop cancers of the mouth, throat, larynx, and esophagus. Additionally, smokers have a heightened risk of lung, bladder, kidney, and pancreatic cancers, along with various circulatory and respiratory diseases.
Tobacco is a plant whose dried leaves are rich in the toxic alkaloid nicotine. It is widely recognized that tobacco contributes significantly to the development of chronic bronchitis, heart disease, and lung cancer in those who smoke regularly. The stalks of tobacco leaves are ground into a fine powder and combined with menthol and various aromatic substances to create snuff. Habitual users of snuff are at an increased risk of developing nasal cancers in specific areas of the nose.