When the heart contracts,called ______,blood pressure increases;when the heart relaxes,called ______,blood pressure decreases.

Question

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During systole, the heart contracts, pushing blood out of the heart and into the arteries, which results in an increase in blood pressure. During diastole, the heart relaxes, allowing blood to flow into the heart from the veins, which results in a decrease in blood pressure. Choice C accurately describes these processes. Choices A and D relate to circulation of blood to the lungs (pulmonary) and to the rest of the body (systemic), respectively, and are not directly related to the process of heart contraction and relaxation. Choice B reverses the order of systole and diastole.

When the Heart Contracts,called ______,Blood Pressure Increases;when the Heart Relaxes,called