Blood pressure : (i) The pressure exerted by the flow of blood on the elastic walls of the arteries is called blood pressure.
(ii) The blood pressure is greater during the systole than during the diastole.
(iii) The blood pressure is measured by the use of sphygmomanometer.
(iv) In normal young person, the systolic pressure is 120 mm Hg and diastolic pressure is 80 mm Hg.
(v) It is normally expressed as \(\frac{120}{80}\).
(vi) The blood pressure varies with age. It is influenced by the rate of heart beat.
