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The circulatory system is made up of the heart, blood vessels, and the blood. The circulatory system functions to transport waste products, oxygen, - ppt download
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How the Heart Pumps Blood
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Heart Anatomy | Anatomy and Physiology
Heart Anatomy | Anatomy and Physiology
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Human Heart: Anatomy, Function & Facts | Live Science
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Cardiovascular System. - ppt download
What is A Normal Resting Heart Rate? | Elemental
The heart is a double pump (article) | Khan Academy
Heart and Circulatory System
