Illustration: Cardiac Cycle Phases: Systole And Diastole
ID 284458475 © Aldonagriskeviciene | Megapixl.com
The cardiac cycle is the performance of the human heart from the beginning of one heartbeat to the beginning of the next. It consists of two periods: one during which the heart muscle relaxes and refills with blood, called diastole, following a period of robust contraction and pumping of blood, called systole.
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cardiac cycle systole diastole blood atria ventricular contraction relaxation muscle heart sound valve aorte pulmonary open closed pump atrial artery vein capillaries venule diagram education science healt medicine medical flow atrium physiology pumping sinus electrocardiogram vessel vascular chamber volume respiration pressure phase beginning filling anatomy
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