Skeletal system

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Across
  1. 3. the most important difference is found at the ____
  2. 4. function- range of motion (___)
  3. 5. makes up the dense outer layer of bone
  4. 7. internal skeleton of an animal
Down
  1. 1. External Skeleton
  2. 2. found inside bones and is lighter and less dense than compact bone
  3. 6. ligaments attach bones to ____