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GCE Biology 1990 Question 19

Question 19

Respiration

Breathing movement in mammals is accompanied by regular movements of the diaphragm and the

  1. A.intercostal muscles
  2. B.vertebral column
  3. C.clavicle
  4. D.pleural cavity
  5. E.floating ribs
Show the answer and explanation

Answer: A (intercostal muscles)

Explanation

The intercostal muscles move the ribs while the diaphragm contracts and relaxes.