Skeletal System Crossword Puzzle

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Across
  1. 2. the process of bone formation
  2. 5. one of the small bones that form the spine
  3. 7. layer of tissue that covers and protects the bone
Down
  1. 1. what kind of joint are the joints between the bones of the skull ?
  2. 3. the long flat bone that forms the center front of the chest wall
  3. 4. spongy substance found inside the bone
  4. 6. the bone in front of the knee joint also known as known as the kneecap
  5. 8. curved bones in a person's chest