What is the primary role of the respiratory system in living organisms? A.to make carbon dioxide B.to obtain oxygen C.to use up nitrogen D.to find hydrogen

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asked May 20, 2017 232k views

3 votes

What is the primary role of the respiratory system in living organisms?

A.to make carbon dioxide

B.to obtain oxygen

C.to use up nitrogen

D.to find hydrogen

Physics
middle-school

KaraokeStu asked

by KaraokeStu

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2 Answers

1 vote

Answer:

To obtain oxygen.

Selle answered May 22, 2017

by Selle

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6 votes

i think its b but not sure

Fahim Babar Patel answered May 25, 2017

by Fahim Babar Patel

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