Difference Between Systolic and Diastolic Blood Pressure

Blood pressure is a serious health problem which affects nearly 40 to 50 percent of the total population.

Blood is a fluid connective tissue which is carried to all parts of our body with the help of the blood vessels called arteries. It plays a key factor in providing blood (thus oxygen and energy) to organs.

Blood pressure is the force of blood against the arteries. An individual should maintain a normal blood pressure from 120 – 140 / 70 – 90 mm Hg. Blood pressure is given by two numbers, with one above or before the other – 120/80.120 – This is called systolic pressure and 80 – This is called diastolic pressure.

Types of blood pressure

  • Systolic Blood Pressure.

The normal range of systolic blood pressure should be 90 – 120 mm Hg.

  • Diastolic Blood Pressure.

The normal range of diastolic blood pressure should be 60 – 80 mm Hg.

Both Diastolic and Systolic are derived from the Greek word. Diastolic meaning drawing apart and Systolic meaning a drawing together.

Here is the differenced between systolic and diastolic blood pressure.

Systolic and Diastolic

Types Diastolic  blood pressure Systolic blood pressure
  Definition The pressure which is exerted on the walls of the arteries. The amount of pressure exerts on the arteries and blood vessels.
Average Range In infants–65 mm Hg.   In adults– 60-80 mmHg. Age 6 – 9 — 65 mmHg. In infants  -95mmHg.     In adults- 90-120 mmHg.  Age 6 – 9 –100  mmHg.
Ventricles of the Heart Fill with blood Left ventricles contract
Reading of Blood Pressure The lower number is diastolic pressure. The higher number is systolic pressure.
Blood Pressure Diastolic constitutes the minimum pressure in the arteries. Systolic constitutes the maximum pressure applied to the arteries.

For more detail information regarding the blood pressure, its types and hypertension, visit BYJU’S.


Practise This Question

Consider the following four statements (A-D) and select the option which includes all the correct ones only.
(A) Single cell Spirulina can produce large quantities of food rich in protein, minerals, vitamins etc. 
(B) Body weight-wise the microorganisms Methylophilus methylotrophus may be able to produce several times more protein than the cows per day 
(C) Common button mushrooms are a very rich source of vitamin C
(D) A rice variety has been developed which is very rich in calcium.