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Why does your heart never tire of constantly beating to pump blood throughout your body?
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5 votes
Why does your heart never tire of constantly beating to pump blood throughout your body?

User Misticos
by
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2 Answers

3 votes
Because it's a muscle
User Vlad Shevchenko
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8.0k points
4 votes
I think it consist of cardiac muscle tissues, which means it moves involuntarily. 
User Swathy Valluri
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8.2k points
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