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In this activity, learners use plastic tubing and a funnel to listen to their heart. Learners also discover that if they run around, their heart pumps harder and faster, making it easier to hear.

This is a demonstration you can use to show learners how valves and pumps work in concert to move blood through the circulatory system.

Learners will build a homemade pump using a balloon, a mason jar, and some straws.

In this activity, learners discover how hard their hearts work to pump blood.