How long can a human live without water How long can human live without food? A human can't live without food for 3 or 4 days (however your body type is,) and a human can't live without water for 2 or 3 days.
Cavities refer to tooth decay, which occurs when specific types of bacteria produce acid that destroys the toothâs enamel and its underlying layer, the dentin. Signs & Symptoms. Cavity symptoms include: 1  Toothache. 2  Sensitivity to sweet, hot or cold foods or drinks.
Caries â The medical term for tooth decay. Cavity â A hole or weak spot in the tooth surface caused by decay. Dentin â The middle layer of a tooth, which makes up most of the tooth's mass. Enamel â The hard, outermost surface of a tooth. Fluoride â A chemical compound containing fluorine that is used to treat water or applied directly to teeth to prevent decay.