2. Year 10 - Blood Vessels Structure

Question 1

What is the structure of the Artery?

Answer 1

Large, Thick, Elastic walls ( to allow it to expand)

Question 2

What is the structure of the Capillaries?

Answer 2

Semi-Permeable membrane (allows one cells to pass through it)
One cells thick to allow gases to pass through (called diffusion).

Question 3

What is the structure of the Veins?

Answer 3

Smaller, Inelastic walls, Contains valves to help blood flow