CARDIAC CYCLE; SYSTOLE & ITS SUB-EVENTS?
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Atrial systole: lasts about 0.1 seconds - both atria contract and force the blood from the atria into the ventricles. Ventricular systole: lasts about 0.3 seconds - both ventricles contract, blood is forced to the lungs via the pulmonary trunk, and the rest of the body via the aorta.
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refer to the attachment
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