The Cardiac Cycle - Unfinished

Question 1

What is happening during late diastole?

Answer 1

Both sets of chambers are relaxed and ventricles fill passively

Question 2

What happens during atrial systole?

Answer 2

Atrial contraction forces a small amount of additional blood into ventricles

Question 3

What happens during isovolumic ventricular contraction?

Answer 3

The first phase of ventricular contraction pushes AV valvs shut but does not create enough pressure to open the semilunar valves

Question 4

What happens during ventricular ejection?

Answer 4

The ventricular pressure rises and exceeds the pressure in the arteries causing the semilunar valves to open and blood is ejected

Question 5

What happens during the isovolumic ventricular relaxation?

Answer 5

As the ventricles relax, pressure in the ventricles falls, blood flows back into the cusps of the semilunar valves and snaps them closed