Arteries And Veins

Question 1

Structures in Arteries and veins

Answer 1

• tough fibrous outer layer
• muscle layer
• elastic layer
• thin inner lining (endothelium)
• lumen

Question 2

Describe the tough fibrous outer layer

Answer 2

Resists pressure changes from both within and outside

Question 3

Describe the muscle layer

Answer 3

Can contract and control blood flow

Question 4

Describe the elastic layer

Answer 4

Maintains blood pressure by stretching and recoiling

Question 5

Describe the endothelium

Answer 5

Smooth which reduces friction and thin to low diffusion

Question 6

Describe the lumen

Answer 6

Allows for blood flow

Question 7

Deferences between arteries and veins

Answer 7

• elastic and muscles layer thicker in artery as they have to pump blood around the body
• lumen is larger in veins so its less resistant to blood flow and helps blood go back to heart
• valves in veins to prevent back flow