Which of the Following Statements Are True of the Cardiac

Which of the following statements are true of the cardiac cycle? (Read carefully and select all of the correct statements.)

A) The cardiac cycle is all of the events that take place in the heart in one minute.
B) Atrial systole is accompanied by ventricular diastole and is followed by ventricular systole.
C) Systole is the contraction phase, and diastole is the relaxation phase.
D) Most of the blood that moves from the atria to the ventricles is pumped.
E) About a third of the blood that moves from the ventricles to the arteries flows passively.
F) The AV valves are closed by the contraction of the ventricles.