How is arterial blood pressure formed?

The human heart beats continuously, and the current activity will transport blood to all parts of the human body. At this time, sufficient pressure must be formed. If the blood pressure is not enough, the blood may not reach certain parts. This is also the blood pressure that everyone is familiar with, and it can also be called arterial blood pressure. In clinical practice, arterial blood pressure has very important physiological significance. So how is human arterial blood pressure formed?

Formation of arterial blood pressure:

Arterial blood pressure refers to the lateral pressure (intensity) of blood on the aortic wall per unit area, generally referring to the blood pressure inside the aorta. Its international standard unit is Pascal (Pa) or kilopascal (kPa), and it was often expressed in millimeters of mercury in the past.

The elastic expansion and contraction of the large arteries play an important buffering role in preventing systolic blood pressure from being too high and diastolic blood pressure from being too low.

Sufficient blood filling in blood vessels is a prerequisite for the formation of arterial blood pressure. The resistance encountered by ventricular contraction and blood flow to the periphery (peripheral resistance) is the basic factor in the formation of arterial blood pressure. Part of the work done by cardiac contraction is used to increase flow rate, and part of it is used to generate lateral pressure. However, if there is no peripheral resistance, blood will quickly flow to the periphery and cannot maintain lateral pressure on the walls of the aorta.

Arterial blood pressure: refers to the lateral pressure of blood on the aortic wall (, generally refers to the blood pressure in the aorta. Because sufficient blood filling in the blood vessels is a prerequisite for the formation of arterial blood pressure. The resistance encountered by ventricular contraction and blood flow to the periphery. It is the basic factor in the formation of arterial blood pressure. However, if there is no peripheral resistance, blood will quickly flow to the periphery, and the lateral pressure on the aortic wall cannot be maintained, and arterial pressure cannot be formed.

In a closed cardiovascular system, sufficient blood volume is a prerequisite for the formation of arterial blood pressure; the power generated by cardiac ejection and the peripheral resistance encountered by blood flow are the two basic factors in the formation of arterial blood pressure; the elasticity of large arteries has a buffering effect on arterial blood pressure. During systole, due to the existence of peripheral resistance, only 1/3 of the blood ejected by ventricular contraction flows to the periphery, and 2/3 is stored in the aorta, causing the aorta to expand and generating lateral pressure on the blood vessel wall. During diastole, although ventricular ejection stops, the expanded walls of the aorta return elastically, allowing the blood to maintain a certain lateral pressure on the blood vessel wall and push the blood to continue flowing. The mechanism of arterial blood pressure is 1. filling of the cardiovascular system with blood 2. cardiac ejection 3. peripheral resistance 4. elastic storage function of the aorta and large arteries.