The Respiratory System

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Across
  1. 3. You really only need one of these
  2. 6. These are hollow spaces in your head
  3. 8. This connects your throat and windpipe
  4. 9. The main purpose of the respiratory system is
Down
  1. 1. These allow you to make noise
  2. 2. Your throat is also called your
  3. 4. This space in your nose filters air
  4. 5. This is a muscle that moves air in and out
  5. 7. Your windpipe is also called your
  6. 10. Exchange of O2 and CO2 occurs here