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Tuesday 22 April 2014

Heart Rate

http://en.wikipedia.org/wiki/Heart_rate

Heart rate is the speed of the heartbeat, specifically the number of heartbeats per unit of time. The heart rate is typically expressed as beats per minute (bpm). The heart rate can vary according to the body's physical needs, including the need to absorb oxygen and excrete carbon dioxide. Activities that can provoke change include physical exercisesleepanxiety, stress, illness, ingesting, and drugs.

The normal human heart rate ranges from 60–100 bpm.



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