Chambers of the HeartThe heart has four chambers: the right atrium, left atrium,right ventricle, and left ventricle. These chambers form twopumps in series: the right heart, which is a low-pressure systempumping blood through the lungs; and the left heart, whichis a high-pressure system pumping blood through the rest ofthe body. (Blood flow through these chambers is illustrated inFigure 31-3.)
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