Across
- 5. diaphragm is supplied by which nerve
- 7. membrane surrounding the lungs
- 8. what physical barrier protects the repiratory system
- 11. air sacs in the lungs where gases exchange occurs
Down
- 1. responsible for lowering surface tension of fluid
- 2. accumulation of pus in lungs called ____
- 3. how do surfactants reduce alveolar surface tension
- 4. muscle aiding in breathing
- 6. process of breathing
- 9. the ability of lungs and thorax to expand
- 10. dividing the nose into ttwo passages