The diagram illustrates pressure changes in various regions of the heart throughout one cardiac cycle. At which stage are the semilunar valves open while the atrioventricular valves are shut?
Biology 9700 · AS & A Level · The heart
The diagram illustrates pressure changes in various regions of the heart throughout one cardiac cycle. At which stage are the semilunar valves open while the atrioventricular valves are shut?