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JAMB Biology 2005 Question 19

Question 19

Respiration

The mammalian lung is made airtight by the

  1. A.pleural cavity
  2. B.mucous membrane
  3. C.pleural membrane
  4. D.diaphragm
Show the answer and explanation

Answer: C (pleural membrane)

Explanation

The pleural membranes line the lungs and the chest wall and seal the chest cavity. This airtight seal is what lets the lungs fill when the chest expands.