Human Phys 4.1 Flashcards
What are all blood vessels?
Distensible (elastic)
What does the elastic nature of arteries allow them to do?
Buffer fluctuations in pressure and pulsatile output to deliver constant non-pulsatile blood flow preventing transmission of excess energy to target organs
What will repeated exposure to pulsatile pressure/flow to high flow organs cause?
Micro vascular hypoperfusion and ischemia
How much more distensible are veins than arteries?
8x more
Why do veins serve as blood reservoirs?
They are much more distensible than arteries (hold 64% of blood volume)
Vascular compliance
Volume/pressure
Compliance
Total quantity of blood that can be stored in a given portion of the circulation
What are more compliant between veins and arteries?
Veins
Elastance
Pressure/volume
What has higher elastance between veins and arteries?
Arteries
Why are IVs given in the veins only?
Because a change in volume does not effect pressure as much
Arteries (pressure and volume)
Pressure increases high and volume stays low
Veins (pressure and volume)
Volume increases high pressure stays low
Stress relaxation
Property or biological tissues that is related to their viscoelastic properties
What happens to blood vessels when exposed to increased pressure?
They show delayed stretching allowing pressure to normalize