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WAEC Biology 2013 Question 15

Question 15

Respiration

Which of the following statements about the diaphragm of a mammal is not correct? It

  1. A.separates the thorax and the abdomen.
  2. B.is a thick layer of muscle.
  3. C.is made of epithelial cells.
  4. D.is part of the human respiratory apparatus.
Show the answer and explanation

Answer: C (is made of epithelial cells.)

Explanation

The diaphragm is a sheet of muscle (with tendon), not epithelium; it separates the thorax from the abdomen and helps breathing.