| A | B |
|---|
| Mouth | Passage-way for air and food |
| Nose | Passage-way for air |
| Trachea | Better known as the windpipe |
| Bronchus | Split into two, one goes into each lung |
| Bronchioles | Are spread throughout the lungs |
| Alveoli | Tiny air sacs where gases are exchanged |
| Diaphragm | Muscle that helps us to breathe |
| Oxygen | Delivered by respiratory system |
| Carbon dioxide | Disposed of by respiratory system |
| Lungs | Organs in charge of breathing |
