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JAMB Biology 2010 Question 20

Question 20

Respiration

The sheet of muscle that separates the thoracic and the abdominal cavities is the

  1. A.intercostal muscle
  2. B.pleural membrane
  3. C.pericardium
  4. D.diaphragm.
Show the answer and explanation

Answer: D (diaphragm.)

Explanation

The diaphragm is a dome-shaped sheet of muscle below the lungs. It divides the chest (thorax) from the abdomen and helps in breathing.