4.3.1 Blood Vessels

Question 1

What do blood vessels do?

Answer 1

Delivery system of dynamic sturctures

Question 2

Job of arteries

Answer 2

carry blood away from heart

Question 3

what arteries carry deoxygenated blood

Answer 3

pulmonary circulation and umbilical vessesl of a fetus

Question 4

job of capillaries

Answer 4

contact tissue cells and serve cellular needs

Question 4

job of capillaries

Answer 4

contact tissue cells and serve cellular needs

Question 5

job of veins

Answer 5

carry blood toward the heart

Question 6

In what order is does blood go to the capillaries to veins

Answer 6

Heart»elastic arteries» Muscular arteries» arterioles» capillaries» postcapillary venules»small veins» Large veins» heart

Question 7

3 layers in veins and arteries to inner and outer

Answer 7

Tunica intima, tunica media, tunica externa

Question 8

layers in capillaries

Answer 8

endothelium with sparse basal lamina

Question 9

What is the job of the lumen

Answer 9

central blood-containg space

Question 10

tunica intima

Answer 10

minimizes friction for blood in lumen

Question 11

what is the subendothelial layer for?

Answer 11

basememnt membrane and loose CT, supports endothelium

Question 12

tunica media layer

Answer 12

smooth muscles an sheets of elastin

Question 13

what is SMCs regulates by

Answer 13

vasomotor nerve that controls vasoconstriction and vasodilation

Question 14

where is the tunica media the thickets

Answer 14

arteries

Question 15

Tunica externa layer

Answer 15

collagen fiber to protect and reinforce

elastin in larger vessels

Question 16

in lsrge vessels tunia externa contain _____ to nourish external layers

Answer 16

vasa vasorum

Question 17

why is the tunica externa infiltrated by nerve fibers and lymphatic vessels?

Answer 17

to communicate with tunica media

Question 18

arteries and veins are usually

parallel

adjacent

Answer 18

parallel

Question 19

Ekastic conducting arteries.

what do they have?
where are they found?
diameter?
large or small lumen and why?

Answer 19

large thick walled and have elastin in all 3 tunics

aorta and major branches

2.5-1cm diameters

large for low resistance

Question 20

how does elastic arteries eject blood evenly

Answer 20

pressure reservoirs, expands and recoils with heart,

Question 21

Muscular arteries

closeness to heart?

diameter?

layer type?

specialties?

Answer 21

distal to elastic arteries, deliver blood to body

1cm to 0.3mm diameter

thick tunica media with more smooth muscle vs elastin

elastic membran on each face of tunic media

Question 22

arterioles

size?

diameter?

layer?

leads to?

controls flow of??

Answer 22

small arteries

0.3mm-10 micrometer

mostly smooth musle

one layer in smalles arterioles

lead to capillary bed

controls flow in capillary bed by vasodilation and vasoconstriciton

Question 23

capillaries

how many walls?

how do they stabilize their walls and control permiability?

size?

diameter?

where are there no capillaries

what is it responsibe for?

Answer 23

1 wall (tunica intimad, 1 cell thick)

pericytes

single RBC

8-10 micrometer

cartilage, epithelia, crona and lens of eye

gas exchange. nutrients,wast and hormone