Hearts

Heart Rates of Different Animals

An average heart pumps 5 liters every minute, and 7,200 liters every day. A lot happens inside your body each time your heart beats.

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Key Facts In This Video

  1. The heart pumps blood in two phases: relaxation and contraction. 00:08

  2. Valves help the heart to avoid overfilling with blood. 00:38

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