Body Systems Crossword

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Across
  1. 5. this system's main organ is the lungs
  2. 6. this system helps to break down food we eat
  3. 7. this system's main job is to filter blood and remove liquid waste from the body
  4. 8. this system contains the heart, veins and arteries
Down
  1. 1. this system is responsible for sending messages from the brain to the rest of the body
  2. 2. this system removes excess waste from the body
  3. 3. this system's main component is bones
  4. 4. this system allows our body to move