Final answer:
The hemodynamic principles in Roger's theory involve factors such as cardiac output, blood volume, contraction, vessel length, and viscosity in determining blood flow and pressure in the circulatory system.
Step-by-step explanation:
In Roger's theory, the hemodynamic principles refer to the factors that affect blood flow and pressure in the circulatory system. These principles include cardiac output, blood volume, contraction, vessel length, and viscosity.
Cardiac output and blood volume impact blood flow and pressure by determining the amount of blood pumped by the heart and the volume of blood in the vessels. Contraction of the cardiac muscle affects the force of blood flow, while vessel length and viscosity affect the resistance to blood flow. These variables interact with Pouseille's equation, which describes the relationship between blood flow, pressure, and resistance in the vessels.
In summary, the hemodynamic principles in Roger's theory involve the interplay of factors such as cardiac output, blood volume, contraction, vessel length, and viscosity in determining blood flow and pressure in the circulatory system.