Which of the following is the primary function of the respiratory system?
a. facilitate gas exchange c. clean the blood
b. get rid of carbon dioxide d. circulate oxygen
A
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A Correct. The primary function of the respiratory system is to facilitate gas exchange in the body.
B Incorrect. The removal of carbon dioxide waste is only one part of the gas exchange.
C Incorrect. Cleaning the blood is euphemistic, and technically incorrect.
D Incorrect. Circulation of oxygen is one part of the gas exchange.
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