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Digestive System: A Kinesthetic Lesson
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In this simulation, learners act out each digestive function of the organs, tissues, and cells in the digestive tract.

Measuring Blood Pressure in Space
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In this activity (page 105 of the PDF), learners measure heart rate and blood pressure and learn how to obtain consistent measurements during repeated tests.

Make a Heart Valve
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In this activity, learners make a model of a one-way heart valve to investigate how a heart controls the direction of blood flow.

What's in Your Blood?
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Doctors often send a sample of blood to a lab, to make sure their patients are healthy.