Respiratory System

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Across
  1. 1. tiny air sacs where gas exchange happens
  2. 4. caused by spasming diaphragm
  3. 5. muscular disc under the lungs
  4. 6. swelling of vocal cords (possibly from infection)
  5. 8. flaplike structure that prevents liquid or food from entering trachez
  6. 10. divides the nasal cavity
  7. 13. voicebox
  8. 15. diaphragm and intercostals relax
Down
  1. 2. diaphragm lowers and intercostals contract
  2. 3. spongy organs with lobes
  3. 7. system that has gas exchange as primary function
  4. 9. windpipe
  5. 11. part of the brain that controls breathing
  6. 12. throat
  7. 14. caused by low oxygen; forces a deep breath