kylnnsmith5675 kylnnsmith5675
  • 13-12-2022
  • Biology
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when the ventricles contract a. the atrioventricular valves open and the semilunar valves close b. the atrioventricular valves close and the semilunar valves open c. the atrioventricular valves close and the semilunar valves close d. the atrioventricular valves open and the semilunar valves open

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