Final answer:
Chewing tobacco commonly enters the body through mucosal administration.
Step-by-step explanation:
Chewing tobacco commonly enters the body through mucosal administration. It is typically placed between the cheek or lip and the gum, from where the active compounds are absorbed through the oral mucosa into the bloodstream. This method allows the tobacco to be slowly metabolized, delivering nicotine and other substances over an extended period of time.
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