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    American Chemical Society
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    In this activity on page 9 of the PDF, learners test how flavoring extracts move through the walls of a balloon. Learners discover that the extracts' motion is similar to the way that oxygen...

    $5 - $10 per student Ages 8 - 14 10 to 30 minutes
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    The Exploratorium
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    In this quick optics activity, learners use a dim point of light (a disassembled Mini MagLite and dowel set-up) to cast a shadow of the blood supply in their retina onto the retina itself. This...

    $1 - $5 per student Ages 8 - 14 Under 5 minutes
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    NSBRI
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    In this activity about the human heart (on page 5 of the PDF), learners work in teams to simulate the volume of blood moved through the circulatory system by transferring liquid into--and through-...

    $1 - $5 per group Ages 8 - 14 45 to 60 minutes
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    NSBRI
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    In this activity about the heart (on page 22 of the PDF), learners examine sheep or chicken hearts to learn about the heart's structure and the flow of blood through the heart. Learners will...

    $10 - $20 per group Ages 8 - 14 45 to 60 minutes
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    NSBRI
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    In this activity about the baroreceptor reflex (BR) arc (page 123 of the PDF), learners discover the importance of maintaining adequate arterial blood pressure through a role playing exercise. This...

    1 cent - $1 per group Ages 8 - 18 45 to 60 minutes
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    NSBRI
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    In this activity about heart health (on page 34 of the PDF), learners measure their own blood pressure using an electronic blood pressure monitor with a self-inflating cuff (included in cost of...

    Over $20 per group Ages 8 - 14 1 to 2 hours