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