The chewing surface of a molar has a bumpy, valley-like shape. This acts like the teeth of a saw, helping to easily grip food that enters the mouth and grind it into smaller pieces. If the chewing ...
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8 causes of itchy bumps that aren't mosquito bites
Medically reviewed by Susan Bard, MD Hives are red, raised bumps that stem from allergies, infections, or stress.Flea and chigger bites look like small, red, pimple-like bumps and feel very ...
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