Multiple choice

Which of the following best describes the function of respiration?

  1. to break food down into smaller nutrients

  2. to eliminate pathogens from the blood

  3. to obtain oxygen & release carbon dioxide

  4. to remove wastes from the bloodstream
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Respiration is the physiological process of gas exchange, specifically taking in oxygen for cellular use and expelling carbon dioxide as a waste product.

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