Question

what is difference between systolic & diastolic pressure ?

Answer 1

systole 
=>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
diastole 
=>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...

Answer 2

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