The oral cavity includes the lips, the inside lining of the lips and cheeks (buccal mucosa), the teeth, the gums, the front two-thirds of the tongue, the floor of the mouth below the tongue and the bony roof of the mouth (hard palate)
Both alcohol and smoking significantly damage the liver, and their combination sharply increases the risk of permanent damage
Smokeless tobacco includes chewing tobacco and snuff, a finely cut or powdered tobacco, which the National Cancer Institute says causes oral, esophageal and pancreatic cancer
Alcohol withdrawal symptoms are believed to spring from the absence of alcohol in the body to regulate the flow of reward-based chemical messengers
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