Across
- 2. keep blood flowing in the right direction
- 5. type of digestion that involves enzymes
- 8. tube that carries air from nose to bronchi
- 10. contracts - we breath in; relaxes - we breath out
- 11. has hairs and mucus to filter, moisten and warm air
- 12. diffuses from alveoli to blood
- 13. the voice box is located here
Down
- 1. type of digestion that physically breaks food apart
- 3. cellular respiration uses O2 and glucose to make ___.
- 4. found in red blood cells and binds to O2
- 6. carries oxygenated blood AWAY from the heart
- 7. carries deoxygenated blood TO the heart & has valves
- 9. air sacs where O2 and CO2 diffuse to and from blood