systole

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sys·to·le / ˈsistəlē/ • n. Physiol. the phase of the heartbeat when the heart muscle contracts and pumps blood from the chambers into the arteries. Often contrasted with diastole. DERIVATIVES: sys·tol·ic / siˈstälik/ adj.

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systole The phase of the heart beat during which the ventricles of the heart contract to force blood into the arteries. Compare diastole. See blood pressure.

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systole (physiol.) regular contraction of the heart and arteries. XVI. — late L. systolē — Gr. sustolḗ, f. SY- + *stol- *stel- place, after sustéllein contract.

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systole
1. The phase of the heartbeat in which the heart contracts.

2. The contraction of a contractile vacuole.

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systole (sis-tŏ-li) n. the period of the cardiac cycle during which the heart contracts.
systolic (sis-tol-ik) adj.