Respiratory and Circulatory System

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