Hearts

The Heart and Major Vessels

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When you gain a pound of fat, your body creates seven miles of blood vessels.

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Key Facts In This Video

  1. The back of the heart is known as its "base". 01:26

  2. Veins returning from the lungs into the left side of the heart are the only veins that carry oxygenated blood. 03:37

  3. There are four valves leading to or from the heart. 05:01

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