Question

The diagram below shows the lungs, which are the main organs in the respiratory system.

What is the main function of the respiratory system?
A.
to send signals from one part of the body to other parts of the body
B.
to break down food into nutrients that can be circulated throughout the body
C.
to exchange oxygen and carbon dioxide gases within the body
D.
to protect the body against foreign substances, such as bacteria and viruses

Answer 1

I am pretty sure the answer would be C. to exchange oxygen and carbon dioxide gases within the body

Step-by-step explanation:

Answer 2

C to exchange oxygen and carbon dioxide gases within the body

Step-by-step explanation:

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