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chal0liemone
chal0liemone chal0liemone
  • 12-08-2016
  • Biology
Answered

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

Verified Answer :

meerkat18
meerkat18 meerkat18
  • 12-08-2016

The primary role of the respiratory system in living organisms is B. to obtain oxygen. The respiratory system is composed of the lungs, diaphragm, trachea, etc which involves oxygen during breathing. When inhaling, oxygen is taken in while it is expelled when exhaled.

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