What is the Respiration
Infections are when you are cut or stabbed with something and you have an open wound and it gets something in the cut or scrap and it gets infection in it.
Carbon dioxide and oxygen
You inhale oxygen in and through your lungs and exhale carbon dioxide. When you breath in oxygen it goes through your lungs .Then when you exhale carbon dioxide it come out of your mouth/nose and helps the plants grow. The trees put off oxygen for us to breath then we put off carbon dioxide for plants to live.