skeletal system

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Across
  1. 3. soft tissue inside a bone
  2. 5. a bone surrounded by a tough layer of connective tissue
  3. 6. a network of tubes that contain blood vessels and nerves
Down
  1. 1. a connective tissue
  2. 2. where one bone attaches to another bone
  3. 4. cartilage is replaced by bone during this process
  4. 7. tough strips of connective tissue