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Body Systems

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Across
  1. 1. pumps your blood
  2. 3. number of chambers in your heart
  3. 5. brain sends messages through the ___ nervous system
  4. 6. used to cool our skin
  5. 9. largest organ in the body
  6. 10. another name for the large intestine
  7. 13. approximately how many bones muscles in your body
  8. 14. largest organ in the nervous system
  9. 16. take blood away from your heart
  10. 18. number of chambers in your heart
  11. 19. approximately how many bones in your body
  12. 20. the muscles that bends a joint
  13. 21. tube in the digestive system
  14. 23. central nervous system consists of brain and ___
  15. 26. anchor bones to muscles
  16. 27. tube in your respiratory system
  17. 29. spinal cord and brain are protected by this
  18. 30. this lung is bigger
  19. 32. valve in our body that opens to let food enter our intestines
Down
  1. 1. ___ have the largest brain of all animals
  2. 2. where blood cells are produced
  3. 4. pigment in our skin
  4. 7. tube in your respiratory system
  5. 8. number of bones in your spine
  6. 11. food plus ___ makes energy
  7. 12. for every thousand red blood cells you have __ white blood cells
  8. 13. nerve that makes your heart pump
  9. 15. chemical your body makes from the food you eat
  10. 17. lining in the stomach to protect it from acid
  11. 22. largest organ in the human body
  12. 24. heart is a muscle and a __
  13. 25. branch on a neuron
  14. 28. tiny passages in our lungs
  15. 29. move bones
  16. 31. first thing to break down food
  17. 33. stuff we make in our stomachs that our body digests