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