Le site de vulgarisation scientifique de l’Université de Liège. ULg, Université de Liège
Systole

The four parts of the heart (Left and right ventricles, left and right atriums), have a systole and a diastole so that blood can be propelled across the cardio-vascular system. While the systole or systolic ejection contracts the ventricles, the diastole releases them. This enables the valves to open and send blood to the arteries.

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