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In this activity, learners take their own pulse and explore how heart rate is affected by various activities.

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.

This experiment is designed to illustrate how fluids, including water, have the ability to flow.

In this activity on page 9 of the PDF, learners test how flavoring extracts move through the walls of a balloon.

Learners will construct a model of a heart valve using a film canister, a piece of masking tape, and a piece of paper.

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.

In this activity, learners act out the flow of blood in the human body! A great way to get learners up and moving while learning about the circulatory system.

In this activity about heart health (on page 27 of the PDF), learners measure their heart rates after a variety of physical activities and compare the results with their resting heart rates, and with

In this activity, learners will investigate the sounds of the heart.

In this activity, learners explore the great pump in their chests--the human heart!