Chambers of the heart

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Illustration of the chambers of the heart

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The heart has four chambers: two atria and two ventricles.

  • The right atrium receives oxygen-poor blood from the body and pumps it to the right ventricle.
  • The right ventricle pumps the oxygen-poor blood to the lungs.
  • The left atrium receives oxygen-rich blood from the lungs and pumps it to the left ventricle.
  • The left ventricle pumps the oxygen-rich blood to the body.
Medical Review:William M. Green, MD - Emergency Medicine
H. Michael O'Connor, MD - Emergency Medicine
Last Updated: 04/27/2007

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