Body systems

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Across
  1. 2. neurons can affect ___
  2. 4. air enters respiratory system through ___ and mouth
  3. 6. blood caries ___ around the body
  4. 8. bones provide ___ for our bodies
  5. 12. bones ___ the organs in our bodies
  6. 15. bones are made up of ___
  7. 16. ___ pull on the joints and allow us to move
  8. 18. ___ muscle is attached to bone with tendons
  9. 20. ___ muscle is found in the heart
Down
  1. 1. the spinal cord is protected by the ___
  2. 3. ___ neurons send info from brain to body systems
  3. 5. the nervous system depends on ___
  4. 7. ___ are part of the respiratory system
  5. 9. humans have ___ different types of muscle
  6. 10. the ___ pumps blood around our bodies
  7. 11. exchange of ___ and CO2 is called respiration
  8. 13. ___ types of blood vessels
  9. 14. the ___ in our body need oxygen to stay alive
  10. 17. ___ neurons send info from eyes to the brain
  11. 19. ___ carry oxygenated blood