Across
- 3. large flat muscle that helps with breathing
- 4. cell fragment that helps form scabs
- 9. filters waste
- 10. system breaks down food
- 12. brings oxygen to the body
- 14. system transports oxygen
- 15. any of the minute branches into which a bronchus divides.
Down
- 1. liquid part of blood
- 2. blood cell that fights disease
- 5. removes cellular waste
- 6. intestine absorbs water
- 7. tiny sacs of lung tissue
- 8. lower chamber of heart
- 11. filter that blood goes through
- 13. upper chamber of heart