Skeletal System Crossword

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Across
  1. 2. What provides the hard, rigid structure to the bone that gives it strength?
  2. 4. The central core of the human body.
  3. 5. What acts as a shock absorber?
  4. 6. Process the body uses to make new blood cells
Down
  1. 1. The network of microscopic tunnels found inside the compact bone of your arms or legs.
  2. 3. Upper limb bones.