Overview of the Function of the CVS Flashcards
1
Q
Define the function of the CVS
A
Bulk flow system;
- O2
- Nutrients
- Metabolites
- Hormones
- Heat
2
Q
Justify the significance of pressure, resistance and capacitance with respect to the CVS
A
Pressure, resistance and capacitance dictate the character of blood flow.
3
Q
Indicate the significance of vascular beds being arranged in parallel or in series
A
If vascular beds are arranged in parallel then;
- All tissues get oxygenated blood
- Allows regional and fractional redirection of blood
4
Q
Explain the function of elastic arteries
A
- Wide lumen, elastic wall
- Dampen pressure variations
i. e. aorta
5
Q
Explain the function of muscular arteries
A
- Wide lumen, strong non-elastic wall
- Low resistance conduit
i. e. other arteries
6
Q
Explain the function of resistance vessels
A
- Narrow lumen, thick contractile wall
- Control resistance and thus, flow
- Allow regional redirection of blood
i. e. arterioles
7
Q
Explain the function of capacitance vessels
A
- Wide lumen, distensible wall
- Low resistance conduit and reservoir
- Allows fractional distribution of blood between veins and rest of circulation (esp. heart)
i. e, veins and venules
