Musculoskeletal System. When the body is stressed, muscles tense up. Muscle tension is almost a reflex reaction to stress — the body's way of guarding against injury and pain. With sudden onset stress, the muscles tense up all at once, and then release their tension when the stress passes.
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My health teacher said it could be all so D
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I would love to help, but I don't know exactly what that means...
Explanation:
Unintentional Injury with an average of 12,341 people a year