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WAEC Biology 1998 Question 12

Question 12

Transport in Animals

A difference between the auricle and the ventricle of the mammalian heart is that the

  1. A.ventricles carry deoxygenated blood
  2. B.ventricles do not have outlets
  3. C.auricles have no valves
  4. D.walls of the ventricles are less muscular than that of the auricles
  5. E.Walls of the ventricles are more muscular than that of the auricles
Show the answer and explanation

Answer: E (Walls of the ventricles are more muscular than that of the auricles)

Explanation

Ventricles pump blood out to the lungs and the whole body, so their walls are thicker and more muscular than the auricles'.