Transportation in Plants and Circulation in Animals — Science STD 10 — Question

The force exerted during the flow of blood against the lateral walls of arteries is called Blood Pressure. Blood pressure is usually expressed in terms of systolic pressure and diastolic pressure.

1. Systolic pressure: The pressure, during ventricular systole, the left ventricle contracts and forces the blood into the aorta is called systolic pressure.
2. Diastolic pressure: The pressure, during diastole, the ventricle relaxes and the pressure falls to the lowest value, is called Diastolic pressure.

In a healthy adult, during the normal resting condition, the systolic and diastolic blood pressure is expressed as 120mm / 80mm Hg.