Beginning with all chambers of the heart in the \"relaxed\" phase,describe the cardiac cycle in mammals, with systole and diastole ofthe atria and ventricles. For each time point in the cycle youselect, state the following:
Whether the atria and ventricles are contracting or relaxing
Whether the AV valves and semilunar valves are closed oropen
Whether the pressure in the atria and ventricles is high orlow
