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Muscular System

by Linfei Xie

Pages 4 and 5 of 5

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Threats?
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Threats include possible injuries such as: sprains, strains, cramps, spasms, splints, and tendinitis. Sprains and strains both involve a stretch and/or tear of part of the muscular system which causes the harm towards the muscular system.
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Fun Facts!

Muscles make up approximately 40 percent of total weight.

The heart is the hardest-working muscle in the body.
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