Across
- 3. balance within all of your body systems
- 5. organs working together
- 6. a tube that transports air to the bronchial tubes
- 7. tissues working together
- 8. tubes (2) that carry air into the lungs
- 10. cells working together form this
- 11. little sacs that absorb air and dispel carbon dioxide as blood vessels pass through it
Down
- 1. an organ system whose job it is to exchange gas
- 2. the smallest living particle in an organism (plural)
- 4. organ systems working together
- 9. a pair of pinkish spongy organs in your chest that take in oxygen and get rid of carbon dioxide