blood pressure may be defined as the pressure or force which the blood exerts on the blood vessels.As there is some delay in the movement ,the blood through the arteriolar & capillary system,the blood pressure in the artiies is always higher than that in veins.
The arterial blood pressure is the result of the discharge of blood from the left ventricle into already full aorta.When the left ventricle contracts and pushes blood into the aorta, the pressure produced is k/a systolic blood pressure which is found to be 120 mm Hg or 16Kpa in a normal adult.
When complete cardiac diastole occurs & the heart is resting with no ejection of blood,the pressure within the blood vessel is termed as diastolic blood pressure which is found to be 80 mm Hg or 11Kpa in a normal adult.
The pressure varies according to the time of day,the posture,sex & age of the individual.During bed rest & night the pressure tends to be lower. It increases with age.The blood pressure is measured by the use of a sphygmomanometer & usually expressed in the following manner
BP=120/80 mm Hg
The arterial blood pressure is the result of the discharge of blood from the left ventricle into already full aorta.When the left ventricle contracts and pushes blood into the aorta, the pressure produced is k/a systolic blood pressure which is found to be 120 mm Hg or 16Kpa in a normal adult.
When complete cardiac diastole occurs & the heart is resting with no ejection of blood,the pressure within the blood vessel is termed as diastolic blood pressure which is found to be 80 mm Hg or 11Kpa in a normal adult.
The pressure varies according to the time of day,the posture,sex & age of the individual.During bed rest & night the pressure tends to be lower. It increases with age.The blood pressure is measured by the use of a sphygmomanometer & usually expressed in the following manner
BP=120/80 mm Hg
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