ballardkdog12
ballardkdog12 ballardkdog12
  • 02-10-2017
  • Health
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The set of particular muscles and nerves which control the heart rate is called the

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legendman27
legendman27 legendman27
  • 02-10-2017
pacemaker is the set of muscles that control the heart
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kayleebueno
kayleebueno kayleebueno
  • 02-10-2017
Each beat of your heart begins with an electrical signal from within your heart.
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