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The cardiac cycle consists of five phases: 1) Atrial Systole, where the atria contract to fill the ventricles with blood; 2) Ventricular Systole, during which the ventricles contract to pump blood into the aorta and pulmonary artery; 3) Isovolumetric Contraction, where the ventricles contract without changing volume as the valves close; 4) Ventricular Diastole, when the ventricles relax and fill with blood; and 5) Atrial Diastole, where the atria relax and fill with blood returning from the body and lungs. This cycle ensures efficient blood circulation throughout the body.

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23h ago

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