lecture 6

Question 1

3 layers of blood vessel wall?

Answer 1

Tunica intima
tunica media
tunica adventitia/externa

Question 2

Layers of the tunica intima?

Answer 2

Endothelium - simple squamous epithelium
Sub endothelium - loose FCT
Internal elastic lamina - sheet of elastic tissue,

Question 3

Is the internal elastic lamina more developed in veins or arteries?

Answer 3

arteries

Question 4

Tunica media is what kind of muscle?

Answer 4

Smooth muscle

Question 5

Tunica media consists of

Answer 5

Connective tissue fibres, mainly elastin and collagen

Question 6

A blood vessel with high blood pressure will have a thick or thin tunica media?

Answer 6

Thick tunica media

Question 7

Tunica externa has a high amount of what tissue?

Answer 7

Connective tissue with high amount of collagen and variable amount

Question 8

The tunica adventitia contains what in larger vessels?

Answer 8

Vasa vasorum

Question 9

Vasa vasorum does what?

Answer 9

Is the large vessels own blood supply

Question 10

lymphatics and autonomic nerves are found in what layer of the blood vessel?

Answer 10

Tunica adventitia/externa

Question 11

Function of an arteriole?

Answer 11

Determine the blood pressure by acting as resistance vessels

Question 12

Function of capillaries?

Answer 12

site of exchange between blood and tissues

Question 13

Veins function?

Answer 13

Low pressure, large volume transport system

Question 14

what is a capacitance vessel?

Answer 14

When veins can store a limited amount of blood and act as a reservoir. they have spare capacity

Question 15

Shape of veins?

Answer 15

irregular, flattened shape with large lumen and thin wall

Question 16

Why do veins have a large lumen?

Answer 16

To carry blood at a low pressure

Question 17

Three layers of veins?

Answer 17

Intima
media
adventitia

Question 18

What is the thickest layer of the veins?

Answer 18

Usually it is the adventitia

Question 19

What has a thicker tunica media, veins or arteries?

Answer 19

Arteries, veins usually only have two distinct layers of smooth muscle.

Question 20

Function of venules?

Answer 20

drain the capillary bed

Question 21

Makeup of venules?

Answer 21

layer of endothelium with small amounts of smooth muscle and collagen

Question 22

Which layer of the veins has valves that prevent back flow?

Answer 22

Intima

Question 23

Where does oxygenated blood leave from?

Answer 23

the left ventricle

Question 24

Blood supply from heart to foot?

Answer 24

left ventricle, travels to the aortic arch -> descending aorta -> abdominal aorta -> Common iliac aorta -> common iliac artery -> external iliac artery -> femoral artery -> popliteal artery -> posterior tibial artery -> plantar arch

Question 25

Venous drainage from foot to heart?

Answer 25

deoxygenated blood will travel up from the plantar venous arch -> posterior tibial veil + great saphenous vein -> popliteal vein -> into the femoral vein -> external iliac vein -> common iliac vein -> Inferior Vena Cava -> right atrium