During mid-to-late diastole, blood flows from the atria to fill
their respective ventricles to prepare for systole. What is
happening during that time?

Choose all that apply?

A. Semilunar valves are open.

B. Pressure in the heart is high.

C.Atria contract to force the remaining blood into the
ventricles.

D.Atrioventricular valves are open.

E. Blood flows passively from veins through atria into
ventricles.