The diagram below shows the lungs, which are the main organs in the respiratory system. What is the main function of the respiratory system?
(1 point)
Responses
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 exchange oxygen and carbon dioxide gases within the body
to exchange oxygen and carbon dioxide gases within 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
to protect the body against foreign substances, such as bacteria and viruses