Respiratory system, Raphael 8B/22

1234567891011
Across
  1. 2. where gas exchange happens
  2. 5. process of taking in oxygen and releasing carbon dioxide
  3. 6. the voice box
  4. 7. type of gas received during inhalation
  5. 8. muscle that buldges upward during exhalation
  6. 10. Tiny branches of the bronchi
  7. 11. The windpipe
Down
  1. 1. The tubes that branch off from the trachea
  2. 3. mechanical process of moving air in and out of the lungs
  3. 4. type of gas expelled during exhalation
  4. 9. A sticky substance that traps dust and particles