In this article we will discuss about:- 1. Meaning of Blood Pressure 2. Factors Influencing Blood Pressure 3. Measurement 4. Regulation. Meaning of Blood Pressure: Blood pressure is defined as the lateral pressure exerted on the vessel wall by column of flowing blood or it is also termed as end arterial pressure. Systolic blood pressure is defined as maximum pressure [...]
In this article we will discuss about the meaning and role of peripheral resistance in cardiovascular system. Meaning of Peripheral Resistance: i. It is the resistance offered by vessel wall for flow of blood. ii. The unit used to measure resistance (pressure divided by flow) is dynes/cm. In other words, resistance in cardiovascular system is generally expressed as R units [...]
There are many theories which try to explain the mechanism of auto-regulation of blood flow. They are: 1. Myogenic theory 2. Tissue metabolite theory 3. Tissue fluid pressure theory 4. Renin-angiotensin theory, etc. (this theory is applicable only in kidneys) 1. Myogenic Theory (Fig. 3.53) According to This Theory: i. When there is an increase in pressure, initially there will [...]