Question

what is the primary function of the respiratory system ?
a. to exhale carbon dioxide only
b. to deliver nutrients to the body
c.to supply oxygen to all parts of the body
d. to transmit messages to our brain​

Answer 1

Answer:

c

Explanation:

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Answer 2

Answer:

a

Explanation:

a is the function of the respiratory system

This is because, option is b and c is done by the vascular system and blood. d is done by nervous system.