passwella.
Menu

WAEC Biology 1991 (August) Question 33

Question 33

Transport in Animals

Which of the following adapts the aorta to the high pressure of the blood from the heart?

  1. A.Thin walls
  2. B.Fragile membrane
  3. C.Thick elastic walls
  4. D.Stiff walls
  5. E.Narrow lumen
Show the answer and explanation

Answer: C (Thick elastic walls)

Explanation

Thick, elastic walls let the aorta stretch and recoil with each heartbeat without bursting.