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Smoking is a practice in which a substance is combusted and the resulting smoke is typically inhaled to be tasted and absorbed into the bloodstream of a person. Most commonly, the substance used is the dried leaves of the tobacco plant, which have been rolled with a small rectangle of paper into an elongated cylinder called a cigarette.
Inhalation of tobacco smoke causes several immediate responses within the heart and blood vessels. Within one minute the heart rate begins to rise, increasing by as much as 30 percent during the first 10 minutes of smoking. Carbon monoxide in tobacco smoke exerts negative effects by reducing the blood's ability to carry oxygen. [91]
Children exposed prenatally to cigarette smoke demonstrate increased risk for fetal growth restriction, sudden infant death syndrome, and addictive behaviors later in life, as well as a host of other secondary health effects. It is thought that epigenetic changes that arise from smoking cigarettes or exposure to cigarette smoke play a role in ...
Passive smoking is the inhalation of tobacco smoke by individuals who are not actively smoking. This smoke is known as second-hand smoke (SHS) or environmental tobacco smoke (ETS) when the burning end is present, and third-hand smoke after the burning end has been extinguished. Because of its negative implications, exposure to SHS has played a ...
The smoke kills by a combination of thermal damage, poisoning and pulmonary irritation caused by carbon monoxide, hydrogen cyanide and other combustion products. Smoke is an aerosol (or mist) of solid particles and liquid droplets that are close to the ideal range of sizes for Mie scattering of visible light. [5]
Smoking cessation is one the most effective methods for managing numerous smoke-related diseases and other immune diseases such as AIDs. [ 25 ] [ 26 ] It brings both short term and long term benefits as the mucus clearance is improved in 48 hours and the mortality risk of lung cancer is halved in 10 years. [ 25 ]
Environmental irritants like smoke or dust. ... A chronic cough can also have a few potential causes. Those include: Asthma. Chronic obstructive pulmonary disease (COPD) Smoking. Gastroesophageal ...
Tobacco smoke, besides being an irritant and significant indoor air pollutant, is known to cause lung cancer, heart disease, chronic obstructive pulmonary disease (COPD), emphysema, and other serious diseases in smokers (and in non-smokers as well). The actual mechanisms by which smoking can cause so many diseases remain largely unknown.