Arteries , Capillaries , Veins

Question 1

What is the structure of A

Answer 1

Structure
Thick outer walls of connective tissue.

Thick layer of muscles and elastic fibres.

Small lumen (space).

NO valves are present.

Question 2

What is the function of A

Answer 2

Function

Arteries carry blood away from the heart.

Able to withstand high pressure created by the heart.

Question 3

What is the structure of C

Answer 3

Structure
• They have very thin walls made up of one layer of endothelial tissue only.

Question 4

What is the function of C

Answer 4

Function

Connect arteries to veins.

Allow substances to easily enter and leave the blood by diffusion, since they have very thin walls (squamous epithelium).

Question 5

What is the structure of V

Answer 5

Structure

Thin outer walls.

Thin layer of muscles and elastic fibres.
Large lumen.

Valves present.

Question 6

What is the function of V

Answer 6

Function

Carry blood back to the heart.
•

Valves in the veins prevent back flow of blood.