3) The heart beats rhythmically 2 ____________times in a person's life.

a) million
b) billion
c) trillion
d) centillion


The answer is b) billion.

Sick or well,
our heart pumps away
without stopping until we die.
It may skip a beat from time to time
or race ahead occasionally,
but it does a fantastic, miraculous job
like no machine ever built.

This estimate of 2 billion is based on a slow, regular heart beat
of 60 beats per minute for around 65 years.
Most peoples' hearts beat faster and longer.


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