Systolic blood pressure is 90- 140mmHg. Diastolic pressure is 60-90mmHg.
Blood pressure refers to the lateral pressure acting on the blood vessel wall per unit area when blood flows in the blood vessel. It is the driving force to promote blood flow in blood vessels, which can be divided into arterial blood pressure, capillary blood pressure and venous blood pressure in different blood vessels. Usually, blood pressure refers to arterial blood pressure in systemic circulation.
Extended data:
The normal value of adult blood pressure is generally between 90- 140. Normal blood pressure means that the blood circulation of the body is unimpeded, and the blood pressure keeps normal operation under the adjustment of various organs of the body, thus providing sufficient nutrition for various organs of the body, maintaining normal metabolism and enabling the functions of various organs of the human body to play normally. If blood pressure is not within the normal range, people's immunity will drop rapidly and they will get sick easily.
Age factor, with the increase of age, the functions of many organs of the body will begin to decline, the blood vessel wall will become brittle and thin, and many parts of blood vessels will be easily blocked or abnormal, thus causing poor blood circulation and high blood pressure.
Baidu Encyclopedia-Normal blood pressure value