Vessel Histology

Question 1

What are the different types of vessels?

Answer 1

Arteries 
Arterioles
Capillaries
Veins
Venules
Lymphatic vessels

Question 2

What are the properties and function of arteries?

Answer 2

Large, thick walls, small lumen (deal with large pressure)

-Take blood away from the heart, get progressively smaller away from the heart

Question 3

What are the properties and function of veins?

Answer 3

Large, thin walls, some have valves, big lumen (deal with low pressure)
-Take blood to the heart and get progressively larger towards to the heart

Question 4

What are the properties and function of lymphatic vessels?

Answer 4

Thin walls, contain valves

-They drain extracelllar fluid from tissues

Question 5

What are the properties and function of capillaries?

Answer 5

Small vessels with extremely thin walls

-Site of exchange

Question 6

What are arterioles?

Answer 6

A small branch of an artery leading to a capillary

-Get progressively smaller away from the heart

Question 7

What are venules?

Answer 7

A small vein, collecting blood from capillaries

-Get progressively larger towards the heart

Question 8

What are the 3 layers in the universal structure of vessels ?

Answer 8

Tunica intima (internal)
Tunica media (middle)
Tunica adventitia (external)

Question 9

What does the tunica intima consist of in vessels?

Answer 9

• Single layer of squamous endothelial cells (endothelium)
• Endothelium sits on a basal lamina
• Contains internal elastic lamina (arteries)

Question 10

What does the tunica media consist of in vessels?

Answer 10

Contains circular smooth muscles and elastin

Question 11

What does the tunica adventitia consist of in vessels?

Answer 11

Contains collagen, longitudinal smooth muscle, and vaso vasorum

Question 12

What are vaso vasorum?

Answer 12

A network of small blood vessels that supply the walls of large blood vessels