The answer is one of these 1. lungs 2.right atrium 3. left atrium 4.right ventricle 5.left ventricle
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Well you have two semilunar valves, one leaving the left ventricle, and one leaving the right. If the aortic semilunar valve is blocked then it would be the left ventricle. A blockage of the pulmonary semilunar valve would cause accumulation in the right ventricle.