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From there, the blood leaves the heart through the aorta to be distributed throughout the body. Blood enters the heart through the superior and inferior venae cavae into the right atrium. This blood then flows through the right atrioventricular valve to the right ventricle.
Not sure what your question is, but... Assuming normal cardiac anatomy, blood flows from the right atrium to the right ventricle, then out the pulmonary artery to the lungs. Blood returns from the lungs to the left atrium, then to the left ventricle, and finally out the aorta to the body.