answersLogoWhite

0

During cardiac systole the left ventricle contracts, the semi lunar valves open and occlude the coronary arteries. During diastole the valves close and because of the elasticity of the aorta which has just been stretched blood now flows into the coronary arteries. The reason for this is that it is easier to supply blood to the cardiac muscle when it is relaxed.

User Avatar

Wiki User

15y ago

What else can I help you with?