Circulatory, respirtory, and skeletal systems

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Across
  1. 1. Whats the system that includes the heart
  2. 5. Lets the blood through but not back
  3. 8. What's another word for breathe out
  4. 10. Where two bones meet
  5. 12. Name the organ that helps you breathe
  6. 13. Flexible material between
  7. 15. What protects vital organs and helps us move
Down
  1. 2. What's another word for breathe in
  2. 3. What is the gas that the respiratory system bring in
  3. 4. What's the blood vessels that comes to the heart
  4. 6. What's the blood vessels that goes away from the heart
  5. 7. Whats the system that includes bones
  6. 9. First part the blood enters
  7. 11. What connects muscle to
  8. 14. Name the system that is involved in breathing