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HMS, BM EQ-Bank 106 MC

During sustained swimming, what is the primary role of the circulatory system in supporting movement?

  1. Carries oxygenated blood from the muscles back to the heart
  2. Delivers oxygen to active muscles through the pulmonary arteries
  3. Delivers oxygen and removes waste products from active muscles
  4. Redirects blood flow to the digestive organs to fuel the muscles
Show Answers Only

\(C\)

Show Worked Solution
  • C is correct: The circulatory system delivers oxygen to muscles while removing waste products such as carbon dioxide during swimming.

Other options:

  • A is incorrect: Blood returning from the muscles to the heart is deoxygenated.
  • B is incorrect: Pulmonary arteries carry deoxygenated blood to the lungs. Oxygen reaches muscles through systemic arteries.
  • D is incorrect: During exercise, blood is redirected away from the digestive organs toward working muscles.