the skeletal system

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Across
  1. 2. Usually, people have 12 ___.
  2. 4. There are 54 _____ in your hands, fingers, and wrists.
  3. 7. Bones are made up of _______, phosphorus, sodium, and other minerals, as well as the protein collagen.
  4. 8. ___ are among the most commonly broken bones.
Down
  1. 1. There are 26 bones in the human _____.
  2. 3. ______ are born with 300 bones.
  3. 5. The ______, in the middle ear, is the smallest and lightest bone of the human skeleton.
  4. 6. The _____, or thighbone, is the longest and strongest bone of the human skeleton.