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In this activity about how the body regulates blood pressure (page 117 of the PDF), learners make and compare measurements of heart rate and blood pressure from three body positions: sitting, standing

1 cent - $1 per group Ages 8 - 18 30 to 45 minutes
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In this activity, learners discover how their heart rate changes in different situations.

$5 - $10 per student Ages 8 - 14 30 to 45 minutes
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In this experiment, pairs of learners explore how cold water affects circulation. The mammalian diving reflex (MDR) slows circulation when the body is exposed to cold water.

free Ages 8 - 18 30 to 45 minutes
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In this activity, learners explore the great pump in their chests--the human heart!

$1 - $5 per group Ages 8 - 18 30 to 45 minutes