What is the main function of the respiratory system? A... | Science Class 5

Science Class 5 Human Body and Health

Asked by AKSHAY GURU VARADHARAJAN · SRI CHAITANYA TECHNO SCHOOL, JAYANTI NAGAR.

What is the main function of the respiratory system?
A.Collect fresh air for the heart
B.Produce carbon dioxide for trees
C.Obtain carbon dioxide from air for the blood
D.Obtain oxygen from air for the blood

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