Skeletal system

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Across
  1. 2. shoulder bone
  2. 6. collar bone
  3. 7. The bone that protects the brain
  4. 8. The longest bone
Down
  1. 1. The largest bone
  2. 3. Knee bone
  3. 4. Bone that protects the spinal cord
  4. 5. Bones that protect the heart and lungs