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Bones (Important bones (spine (made up of vertebrae, holds our body up,…

- - - - elbows
      - knees
- - - - puddle of eyes, ears, hair, etc.
  - - - with muscles
- - - - the hardest layer
      - smooth
    - - spongy
      - pretty hard
    - - nerves & blood vessels
    - - marrow
        
        makes blood cells
  - - - pieces connect together