Blood vessels Flashcards
1
Q
Arteries
A
Take blood away from the heart
2
Q
Veins
A
Take blood back to the heart
3
Q
Capillaries are the site of
A
nutrient, gas and waste exchange between blood and tissues
4
Q
Elastic Artery
A
- Largest type
- thick walled
- close to the heart
- primarily made up of elastic tissue
- allows for expansion and contraction for smooth blood flow
5
Q
Muscular Artery
A
- branches off the elastic artery, slightly smaller
- distributes blood to the parts of the body
- controls blood flow
6
Q
Arterioles
A
- mostly made up of smooth muscle
- held together by an outer layer of collagen
7
Q
Vasoconstriction
A
- contraction of blood vessels, smaller = less blood flow more blood pressure
8
Q
Vasodialation
A
- relaxation of the blood vessel, larger = more blood flow, less blood pressure
9
Q
Capillaries
A
- smallest vessels
- connects the arteries and veins
- thin walled allowing oxygen and carbon dioxide to move across the membrane simply
10
Q
Continuous Capillary
A
- least permeable and most common (skin and muscle)
11
Q
Fenestrated Capillary
A
- large fenestrations (pores) = increased permeability
12
Q
Sinusoidal Capillary
A
- most permeable
13
Q
Pre- capillary sphincters
A
are valves that regulate blood flow into each capillary bed
14
Q
Venules made up of
A
formed by capillaries joining together
15
Q
Veins made up of
A
formed by venules joining together
