Systole Notes: Definitions & Explanations PDF | Download eBooks
Study Systole lecture notes PDF with biology definitions and explanation to study What is Systole?. Study systole explanation with biology terms to review biology course for online degree programs.
Systole Definition:
Contraction phase of the cardiac cycle is called systole.
Campbell Biology by J.B. Reece, L.A. Urry, M.L. Cain, S.A. Wasserman, P.V. Minorsky, R.B. Jackson
Systole Notes:
The systole is the part of the cardiac cycle during which some chambers of the heart muscle contract after refilling with blood. When, in late ventricular diastole, the atrial chambers contract, they send blood down to the larger, lower ventricle chambers. When normal flow is completed, the ventricles are filled and the valves to the atria are closed. The ventricles now perform systole isovolumetrically, which is contraction while all valves are closed - ending the first stage of systole. The second stage proceeds immediately, pumping oxygenated blood from the left ventricle through the aortic valve and aorta to all body systems, and simultaneously pumping oxygen-poor blood from the right ventricle through the pulmonic valve and pulmonary artery to the lungs.
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