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My friend said that there's a muscle in the body that never ever ever rests. Is that true!
Signed, Incredulous


Dear Incredulous:



Absolutively, my friend. Your heart is mostly muscle and keeps blood circulating around your body. If it didn't keep squeezing one or two times every second all day and all night long, you wouldn't be around to e-mail me this question!

Signed,

Wendell



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