Diastole – (pronounced Di asterly)
Diastole is when the heart muscles relax.
The hair dresser dyed a dastardly (diastole) man’s hair while the next customer relaxed and waited with a cup of tea.
This is when the heart fills with blood. During this time the ventricles relax. This generates a suction force, which causes the blood to flow into the two ventricles. When the ventricles relax the pulmonary and aortic valves (semilunar valves) shut. At this time both the tricuspid and bicuspid valves (atrioventricular valves) are open, directing blood from the atria into the ventricles.