Blood Vessels

Question 1

Structure of the Arteries

Answer 1

• Thick walls
• Elastic
• Small lumen

Question 2

Function of the Arteries

Answer 2

Transport blood away from the heart (oxygenated blood).

Question 3

Structure of the Veins

Answer 3

• Thin walls
• Wider lumen
• Has valves

Question 4

Function of the Veins

Answer 4

Transport blood towards the heart (deoxygenated blood). It has valves to prevent ‘back flow of blood’ and keep blood flowing.

Question 5

Structure of the Capillaries

Answer 5

• Thin wall

- 1 cell thick for diffusion

Question 6

Function of the Capillaries

Answer 6

Exchange of gases and nutrients which occurs between blood and tissue by the process of diffusion. Leucocytes can also pass through the Capillary wall.