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=>this is the contraction phase of the cardiac cycle 
=>when the heart contracts it pumps blood from the heart chambers into the heart chambers into the aorta and pulmonary artery 
=>it occurs in two stages 
=>the pressure of systole is high 
=>systolic pressure for a normal person is 120
=>this is the relaxation phase of the cardiac cycle 
=>when the heart relaxes and allows the chambers to be filled with blood from venacava and pulmonary veins 
=>it occurs in one stage 
=>the pressure of diastole is less.
=>diastole pressure for a normal person is 80...
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The pressure of blood inside the artery during ventricular contraction is called systolic pressure..
and pressure in artery during ventricular relaxation is called diastolic pressure
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