| A | B |
|---|
| Respiration | the process in which oxygen and glucose undergo a complex series of chemical reactions inside cells |
| Cilia | tiny hairlike extensions that can move together like whips |
| trachea | windpipe |
| bronchi | passage that directs air into the lungs |
| lungs | main organs of the respiratory system |
| alveoli | tiny sacs of lung tissue specialized for the movement of gases between air and blood |
| diaphragm | a large, dome-shaped muscle that plays an important role in breathing |
| mucus | thick slippery substance that coats inside of nose and trachea |
| oxygen | substance the respiratory brings into the body |
| carbon dioxide | substance that respiratory system removes from the body |
| nose | moistens and warms air coming in from the environment |
