Crossed Bones

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Across
  1. 3. Is tough but flexible where some bones meet.
  2. 4. Protect inner organs.
  3. 5. A soft material that helps make blood cells.
  4. 6. Where bones meet
Down
  1. 1. A break in a bone.
  2. 2. Bones that make up the spine and backbone.
  3. 5. A solid material that makes up most of the skeletal system