Your friend says the following to you: "The lungs are the main part of the respiratory system. You really don't need the rest of the other organs [in the respiratory system]." Prove this to be a false statement.

This statement is false because the respiratory system includes  muscles that power your lungs. These muscles work together to move oxygen through your body and it cleans out waste like carbon dioxide.

The respiratory system also allows us to speak and smell. So we clearly need all of the organs in our respiratory system.

feral cats are estimated to eat tens of millions of native animals each night in australia