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Please answer as soon as possible.... The respiratory system is responsible for the exchange of oxygen and what gas?

A. nitrogen
B. hydrogen
C. water vapor
D. carbon dioxide

User Meen
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it should be B

hope it helped <3
User Johnnie
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The correct response would be D. Carbon dioxide. These are the 2 dominant gases involved in gas exchange both on the multi cellular level for the organism and also the cellular one.
User Libertyernie
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