Across
- 2. a hollow tube strengthened and kept open by rings of cartilage
- 5. these branch many times
- 8. process by which the body takes in oxygen and remove carbon dioxide
- 10. when you inspire this gas is consumed
- 12. the diaphragm relaxes and moves upwards by breathing out
- 15. also known as the throat
- 16. contracts and relaxes
Down
- 1. when you expire this gas is exerted
- 3. extremely thin walls
- 4. the diaphragm contracts and flattens by breathing in
- 6. bag like organs
- 7. also known as the chest cavity
- 9. warmed, moistened and filtered of any foreign material
- 11. deliver air to the lungs
- 13. remove dirt, irritants and mucus through steady, rhythmic movements
- 14. also known as the voice box