| A | B |
|---|
| nose/mouth | where oxygen enters the body |
| trachea | a tube that air travels through between the mouth/nose and the lungs |
| lungs | the organs where respiration takes place |
| bronchial tubes | airways that connect the lungs and trachea |
| alveoli | where the oxygen/carbon dioxide exchange takes place |
| diaphragm | a muscle that helps us breathe |
