Labels:text | screenshot | font OCR: How your heart works X Your heart beats about once every second. With Left atrium each beat, blood flows into your heart through the upper chambers, down into the Right atrium lower chambers, and is then Left pumped out to the rest of ventricle your body. The sound of your heart beating is made as the valves inside your heart slam shut. You can Right hear this sound clearly ventricle through a stethoscope. How your heart works
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