structure of blood vessels

Question 1

structure of an artery?

Answer 1

.thick outer wall
.small lumen
.thick layer of muscle

Question 2

role of an artery?

Answer 2

carries blood away from the heart

Question 3

structure of a vein?

Answer 3

.large lumen
.thin outer wall
.thin layers of muscle

Question 4

role of a vein?

Answer 4

carry blood to the heart and prevent backflow

Question 5

structure of capillaries?

Answer 5

.very small lumen
.wall made of a single layer of cell

Question 6

role of the capillaries?

Answer 6

exchange of materials between blood and tissue cells