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