| A | B |
|---|
| nose | filters, moistens, warms air |
| throat | pharynx |
| voice box | larynx |
| wind pipe | trachea |
| cilia | hairlike projections that line the trachea trapping dirt |
| bronchi | two tubes that branch off the trachea |
| bronchiole tubes | smaller branches of the bronchi |
| alveoli | air sacs at the ends of bronchiole tubes |
| capillaries | blood exchanges carbon dioxide for oxygen at the alveoli |
| alveoli | air exchanges oxygen for carbon dioxide at the capillaries |
| respiratory system | delivers oxygen to the body |
| diaphragm | muscle directly under the chest cavity |
| intercostal muscles | muscles between ribs |
| as you inhale | the diaphragm contracts |
| as you exhale | the diaphragm relaxes |
| as you inhale | your chest space increases |
| as you exhale | your chest space decreases |
| when you inhale | air pressure is greater outside our body then inside your lungs |
| when you exhale | air pressure in greater inside your lungs than outside your body |
