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The way upper and lower teeth fit together during biting and chewing.
Biting fingernails, avoiding eye contact, grinding teeth, chewing on pencils, foot tapping. twirling hair, fidgety fingers, biting lower lip
maybe
Biting and chewing. This muscle is capable of generating more force (pounds per square inch) than any other muscle in the human body. (It is why an acrobat can spin from a dangling rope while holding onto it with nothing but his or her teeth, leaving the arms and legs free to turn).
I think the jaws
A bug that has 3 body parts and 6 legs and antennae is called an insect. The insect you're talking about with a striped lower Body Part is probably a bee, or a wasp.
No it does not unless you swallow it.
Bella's nervous habit was biting her lower lip.
A dog is likely chewing or urinating on the leaves.
The masseter muscle is the chewing muscle covering the angle of the mandible. During bilateral contraction, the muscle elevates the mandible, raising the lower jaw.
bedbugs
an abdement bug