Vessels

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created 8 years ago by chemistry_goo
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1

Arteries

Carry blood away from heart
Carry O2
Snap back in shape due to elastic fibers

2

Capillaries

Smallest of blood vessels for nutrients and gas exchange

3

Veins

Carry blood to heart - valves for gravity
Carry deO2

4

Tunica Intima

Endothelium
Internal elastic layer
Continuos w/ endocardium

5

Tunica Media

External elastic membrane
Circular sheets of smooth muscle
Maintain blood pressure (artery)
Tolerates huge pressure change

6

Tunica Externa (Adventitia)

Connective tissue sheath
Nerves, small blood vessels
*Relatively thick in veins

7

Tunica Media

Layer maintains blood pressure ( elastic artery) by distributing the energy of systolic pressure

8

Tunica Media

Layer contains circular sheets of smooth muscle

9

Tunica Intima

Layer contains endothelium

10

Tunica Intima

Layer is continuous w/ endocardium

11

Tunica Externa

Layer contains nerves and small blood vessels

12

Tunica Externa

Layer is relatively thick in veins

13

Tunica Externa

layer contains connective tissue sheath

14

Artery

Snaps back in shape due to elastic fibers
contraction relaxation control diameter

15

Veins

contain valves - work against gravity

16

Vasoconstriction

contraction of smooth muscle decreases diameter

17

Vasodilation

relaxation of smooth muscle increases diameter

18

Elastic Arteries

tolerates huge pressure change in tunica media

19

Elastic Arteries

distributes energy of systolic pressure spikes in tunica media

20

Muscular Arteries

more muscular layer in tunica media

21

Elastic Artery measure

D: 1.5 cm
T: 1 mm

22

Muscular Artery

D: 6 mm
T: 1 mm

23

Arteriole

D: 37 um
T: 6 um

24

Arteriole

resistance vessels, decrease diameter which increase resistance and blood pressure

25

Arteriole

vessel has poorly defined tunica externa
and tunica media is 1-2 layers

26

Arteriole

changes in diameter due to hormonal or nervous stimulation

27

Muscular Arteries

distributes blood to tissues- 'distribute arteries

28

Elastic Arteries

transports large volumes of blood away from heart - 'conducting arteries'

29

Elastic Arteries

another name for conducting artery

30

Muscular Arteries

pressure point to stop bleeding

31

Arterioles

smallest blood arteries

32

Artery to Arteriole to Capillary to Venules to Veins

order of vessel blood flow

33

Tunica Interna - Internal Elastic membrane - Tunica Media - External Elastic membrane - Tunica Externa

layers of vessel inner to outer including elastic membrane

34

Elastic Arteries

transport larve volume of blood away from heart

35

Elastic Arteries

tunica media contains lost of elastic fiber and little smooth muscle for cardiac cycle