Which among the following is responsible for increasing carbon monoxide (CO) content in blood and reduces the concentration of haem bound oxygen ?

Cannabinoids inhalation . Tobacco smoking . Heroin snorting. None of these.

Tobacco smoking .

Tobacco chewing is associated with increased risk of cancer of the oral cavity. Smoking increases carbon monoxide (CO) content in blood and reduces the concentration of haembound oxygen. This causes oxygen deficiency in the body.