During which phase does the heart muscle contract and pump blood?

During which phase does the heart muscle contract and pump blood?

• A. Diastole
• B. Systole
• C. Clean Catch Urine
• D. Fowler's Low Position

Answer: (B)

During systole, the heart muscle contracts and pumps blood. This phase mainly involves the ventricles contracting, which raises their pressure, opens the semilunar valves, and ejects blood into the aorta and pulmonary artery. The atrioventricular valves close as the ventricles contract, contributing to the heart sounds heard with a pulse. Diastole, in contrast, is the relaxation phase when the heart chambers fill with blood, not when they pump. The other options involve a urine collection procedure and a patient position, which are unrelated to the heart’s contraction and pumping action.

During systole, the heart muscle contracts and pumps blood. This phase mainly involves the ventricles contracting, which raises their pressure, opens the semilunar valves, and ejects blood into the aorta and pulmonary artery. The atrioventricular valves close as the ventricles contract, contributing to the heart sounds heard with a pulse. Diastole, in contrast, is the relaxation phase when the heart chambers fill with blood, not when they pump. The other options involve a urine collection procedure and a patient position, which are unrelated to the heart’s contraction and pumping action.