The diagram below shows the lungs, which are the main organs in the respiratory system. What is the main function of the respiratory system?

Question

(1 point)
Responses

to exchange oxygen and carbon dioxide gases within the body
to exchange oxygen and carbon dioxide gases within the body

to protect the body against foreign substances, such as bacteria and viruses
to protect the body against foreign substances, such as bacteria and viruses

to break down food into nutrients that can be circulated throughout the body
to break down food into nutrients that can be circulated throughout the body

to send signals from one part of the body to other parts of the body
to send signals from one part of the body to other parts of the body

Answer 1

The main function of the respiratory system is to exchange oxygen and carbon dioxide gases within the body.