The aortic and pulmonary semilunar valves close when the ____________________ relax.
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Q152: The general function of all the valves
Q153: The _ valve prevents backflow of blood
Q154: The two coronary arteries are branches of
Q155: For the myocardium, the most important substance
Q156: The term diastole means _ of the
Q158: The branches of the ascending aorta are
Q159: The right and left AV valves close
Q160: The term for contraction of the chambers
Q161: The sequence of events in one heartbeat
Q162: Stroke volume is the amount of blood
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