Across
- 1. organ that is in charge of circulating blood
- 3. brings deoxygenated blood back to the heart
- 7. brings oxygenated blood to the body
- 8. where gas exchange happen
- 9. you breathe in __________
- 10. Tiny blood vessel
Down
- 2. hardening of the arteries due to fat deposit
- 4. happen when a blood vessel in the brain becomes blocked or bursts
- 5. dioxide you breathe out ______________
- 6. important muscle in the respiratory system