Which statement CORRECTLY describes systolic and diastolic pressure in the human circulatory system?
Systole is contraction, diastole is relaxation
The heart pumps blood through a rhythmic cycle consisting of two alternating phases in each chamber.
Systole refers to the phase in which the heart muscle contracts and pumps blood out into the arteries, causing systolic pressure, the higher reading in blood pressure measurement.
Diastole refers to the phase in which the heart muscle relaxes and the chambers fill with blood, corresponding to diastolic pressure, the lower reading in blood pressure measurement.
Hence, systole is contraction and diastole is relaxation.
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