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結果 : what organ system is your heart a part of
6:10

The Human Heart for Kids | Educational video to learn all about how the heart works

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Circulatory System and Pathway of Blood Through the Heart

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How the heart actually pumps blood - Edmond Hui

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The Human Body: The Heart | Educational Videos For Kids

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This Is What Your Internal Organs Look Like

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The Circulatory System Part 1: The Heart

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Your heart can beat outside the body!

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A journey inside a beating heart. 🫀💓

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GCSE Biology - The Heart #23

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Organs of the Human Body Songs | Anatomy Education Songs

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