Is Heart one of the strongest working muscle in a human body?

 So the answer is simply Yes, the heart is so called the strongest working muscle of a human body because the heart is made up of cardiac muscles which are present in a human heart in a large number. The average heart of a person beats 72 times a minute,100000 times a day,3600000 a year,2.5 billion times in a span of 70 years. this is the great example of dynamic strength of human heart.

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