Unit 5 Vessels Flashcards
1
Q
Vessel Types
A
- Arteries
- Capillaries
- Veins
2
Q
Artery Characteristics
A
- Blood traveling away from heart
- High pressure
- Thick walls
3
Q
Larger Arteries
A
- Elastic
- Conduction & propulsion
4
Q
Smaller Arteries
A
- Muscular
- Vascular tone
5
Q
Capillaries
A
- Between veins & arteries
- Single cell thick
- Diffusion
6
Q
Veins
A
- Blood traveling towards heart
- Low pressure
- Thin walls
- Contain valves (below heart)
7
Q
Arteriole
A
- Small artery
- Regulates blood flow to capillaries
- Resistance vessels (sphincters)
- Vasoconstriction/vasodilation
8
Q
Venules
A
- Drain capillary blood
- Capacitance vessels (distensible)
9
Q
Venous Sinus
A
- Drains blood back to heart/other veins
- Dural in brain
- Coronary in heart
10
Q
Anastomoses
A
- Two arterial branches supply same area
- Collateral blood supply
11
Q
Valves
A
- Promote unidirectional blood flow back to heart
- Exist below heart only
12
Q
Varicose Veins
A
- Valves are unable to close
- Retrograde flow
13
Q
Areas Effected by Varicose Veins
A
- Superficial veins (limbs)
- Anal canal (hemorrhoids)
- Esophagus (liver disease)
14
Q
Causes of Varicose Veins
A
- Congenital
- Mechanical
- Aging
15
Q
Treatment of Varicose Veins
A
- Tight socks
- Occluding vessels (close)
- Removal
