The Respiratory System

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