Organs

12345678910
Across
  1. 3. helps regulate breathing
  2. 6. air sacs inside the lungs
  3. 8. helps circulate blood
  4. 9. main organ of the nervous system
  5. 10. allows movement
Down
  1. 1. the main organ of the respiratory system
  2. 2. windpipe
  3. 4. releases enzymes into the stomach
  4. 5. filters blood
  5. 7. help make blood cells