Unit 3: Vessels, Lymphatic, and Immune System

function of arteries

control blood flow through body through vasodilation and vasoconstriction

vasodilation

stretching of blood vessels to increase blood flow

vasoconstriction

narrowing of blood vessels to decrease blood flow

location of elastic arteries

heart

contain lots of smooth muscle in tunica media for greater manipulation of blood flow

muscular arteries

function of arterioles

connect arteries to capillaries

17

splenic artery

18

common hepatic artery

16

Gastric artery

A

tunica interna

B

tunica media

C

tunica externa

1

vertebral artery

2

internal carotid artery

3

external carotid artery

4

common carotid artery

10

subclavian artery

7

axillary artery

4

common carotid artery

5

brachiocephalic trunk

6

common carotid artery

7

subclavian artery

8

ascending aorta

9

aortic arch

10

subclavian artery

11

axillary artery

12

thoracic aorta

13

posterior intercostal arteries

14

abdominal aorta

15

celiac trunk

19

superior mesenteric artery

20

renal arteries

21

inferior mesenteric artery

22

gonadal arteries

23

common iliac artery

24

internal iliac artery

25

external iliac artery

26

femoral artery

30

brachial artery

31

radial artery

32

ulnar artery

33

palmar arches

34

digital arteries of the hand

26

femoral artery

27

popliteal artery

28

anterior tibial artery

29

posterior tibial artery

30

plantar arches

31

digital arteries of the foot

A

suprarenal artery

A

superior vena cava

B

brachiocephalic vein

C

vertebral vein

D

internal jugular vein

E

subclavian vein

F

external jugular vein

A

superior vena cava

B

brachiocephalic vein

C and D

subclavian veins

E

axillary vein

F

cephalic vein

G

median cubital vein

H

basilic vein

J

brachial vein

K

radial vein

L

ulnar vein

M

palmar venous arches

N

digital veins of the hand

O

azygos vein

P

posterior intercostal veins

Q

hemiazygos vein

R

accessory hemiazygos vein

S

inferior vena cava

T

gonadal vein

U

suprarenal vein

V

renal veins

W

gonadal vein

X

suprarenal vein

X

internal jugular vein

W

external jugular vein

Y

hepatic veins

Z

common iliac vein

B

internal iliac vein

A

external iliac vein

C

great saphenous vein

D

femoral vein

E

popliteal vein

F

small saphenous vein

G

anterior tibial vein

H

posterior tibial vein

J

plantar venous arches

K

digital veins of the foot

anastomoses

alternative interconnections of blood vessels

collateral circulation

network of arterioles and capillaries that can bypass obstructed arteries and supply blood, reducing damage during stroke or an artery disease

precapillary sphincters

ring of smooth muscle that regulate capillary blood flow

capillary function

connect venules to arterioles for exchange of nutrients

capillary exchange

nutrients and O2 exit, CO2 and waste enter

function of venules

transport deoxygenated blood from capillaries to veins

factors influencing flow of deoxygenated blood

venous valves prevent back flow, skeletal muscle contractions and diaphragm action help push blood up to heart