Skeletal System Crossword Puzzle

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Across
  1. 1. layer of tissue that covers and protects the bone
  2. 4. the process of bone formation
  3. 7. one of the small bones that form the spine
  4. 8. joints you can’t move
Down
  1. 2. curved bones in a person's chest
  2. 3. spongy substance found inside the bone
  3. 5. the long flat bone that forms the center front of the chest wall
  4. 6. the bone in front of the knee joint otherwise known as the kneecap