Across
- 1. goes in your body
- 6. the system that I'm doing
- 8. about how many times you breathe a day
- 9. what you breathe in
Down
- 2. something that carries the blood through your body
- 3. Something that holds you air after you breathe in
- 4. what you breathe out
- 5. also known as the windpipe
- 7. something that filters the air