Medical Quiz

Topics: Respiration, Immune System, Blood Cells Quiz

Why do arteries have a thick muscle layer?

A. To provide energy for the blood vessel.

B. To prevent the blood flowing backwards.

C. To help withstand the high pressure blood, also to contract to control blood flow.

Select your answer:
     


Preview next quiz:

Which type of cell is found in the greatest numbers in blood?

A. Red blood cell

B. White blood cell

C. Platelets