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One of the two (left, right) upper chambers of the heart. The right atrium receives oxygen-depleted blood from the body and pumps it into the right ventricle. The left atrium receives oxygen-rich blood from the lungs and pumps it into the left ventricle. [1]

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References[]

  1. Donche, Dan (2008). FF Trainer Certification Guide. USA: Fatal Fitness. 
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