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Biology 8 Online
OpenStudy (anonymous):

do any secretions take place in the Respiratory system and where?

OpenStudy (anonymous):

Carbon dioxide is produced as a result of metabolic break down of carbohydrates in body and must be eliminated quickly. Carbon dioxide is brought to the lungs by blood and is lost from the lungs through gaseous exchange with fresh air in lungs.

OpenStudy (anonymous):

thanks

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