| A | B |
|---|
| muscle that causes your chest to expand when you breathe | diaphragm |
| main organ of the respiratory system | lung |
| place where oxygen and carbon dioxide are exchanged between air and blood | alveolus |
| branching tube that carries air into the lungs | bronchus |
| warms, moistens, and filters air coming into the respiratory system | nose |
| structure that enables you to speak | larynx |
| tube that provides a passageway for air | trachea |
| directs air down the respiratory path and food & water down the digestive path | epiglottis |
| one of two structures that vibrates, producing sound | vocal cord |
| throat | pharynx |
