Across
- 2. Main organ for breathing
- 5. Exercising without oxygen
- 6. Our primary inhaler
- 8. Our main energy source
- 10. Another word for our throat
- 11. Tubes in our lungs
- 13. Muscle that is dome shaped
- 14. Exercising using oxygen
Down
- 1. Small air sacs where gas exchange occurs
- 3. The by-product of anaerobic respiration
- 4. The amount of oxygen that needs to be repaid to the body after intense exercise
- 7. Muscles inbetween our ribs
- 9. Voice box
- 12. Wind pipe