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When the semilunar valves are open, which of the following are occurring?1) Coronary arteries fill2) AV valves are closed3) Ventricles are in systole4) Ventricles are in diastole5) Blood enters aorta6) Blood enters pulmonary arteries7) Atria contracta. 2,3,5,6b. 1,2,3,7c. 1,3,5,6d. 2,4,5,7
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