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Cigarettes are known to cause many lung diseases including emphysema, chronic bronchitis, and lung cancer. Smoker's macrophages are alveolar macrophages whose characteristics, including appearance, cellularity, phenotypes, immune response, and other functions, have been affected upon the exposure to cigarettes. [1]
Over time, the marijuana gateway hypothesis has been studied more and more. In one published study, the use of marijuana was shown not a reliable gateway cause of illicit drug use. [67] However, social factors and environment influence drug use and abuse, making the gateway effects of cannabis different for those in differing social circumstances.
This is an accepted version of this page This is the latest accepted revision, reviewed on 7 January 2025. Circumstances, mechanisms, and factors of tobacco consumption on human health "Health effects of smoking" and "Dangers of smoking" redirect here. For cannabis, see Effects of cannabis. For smoking crack cocaine, see Crack cocaine § Health issues. "Smoking and health" redirects here. For ...
Tobacco use, which includes smoking cigarettes, cigars, pipes and smokeless tobacco, and the use of alcohol are the two most common causes of head and neck cancers, experts say.
What are effects of smoking marijuana on the lungs? Marijuana could cause a type of emphysema more than tobacco smoking, new study finds. Smoking marijuana can raise risk of lung disease, chest ...
A dried cannabis flower. The short-term effects of cannabis are caused by many chemical compounds in the cannabis plant, including 113 [clarification needed] different cannabinoids, such as tetrahydrocannabinol, and 120 terpenes, [1] which allow its drug to have various psychological and physiological effects on the human body.
For instance, "Cigarette smoking accounts for about one-third of all cancers, including 90 percent of lung cancer cases. [Smoking also] causes lung diseases such as chronic bronchitis and emphysema, [and can] increase the risk of heart disease, including stroke, heart attack, vascular disease, and aneurysm."
Marijuana consumed decades ago had concentrations of THC, the main psychoactive ingredient, of 2 to 3%, but cannabis products today can have THC levels as high as 90%.