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Systole |
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systole
contraction of the heart, during which blood is pumped into the aorta and the arteries that lead to the lungs systole [′sis·tə·lē] (physiology) The contraction phase of the heart cycle. Systole the contraction of cardiac muscle, or the myocardium. A systole consists of separate but successive atrial and ventricular contractions. The cardiac cycle comprises consecutive systolic and diastolic movement. In man, 75 heart beats per minute are accompanied by atrial and ventricular systoles that last 0.1 sec and 0.3 sec, respectively. Blood enters the ventricles from the atria during atrial systole and is ejected into the vascular system during ventricular systole. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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