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GALLERY: Human Heart Rate

Heart rate is the speed of the heartbeat measured by the number of contractions (beats) of the heart 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 . It is usually equal or close to the pulse measured at any peripheral point. Activities that can provoke change include physical exercise , sleep , anxiety , stress , illness , and ingestion of drugs .

In this activity, your students are participating as subjects to provide data for analysis. This raises ethical issues, some of which could be addressed by using the briefing sheet and consent form attached. The activity involves students exerting themselves in light exercise and monitoring their heart rate for a period afterwards. Collating class data allows you to develop ideas about averages and variation within a population.

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