The Skeletal and Nervous System Puzzle

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Across
  1. 2. The jelly like substance inside a bone that makes blood cells
  2. 4. The largest bone in the human body
  3. 7. The upper arm bone
  4. 9. Something that joins muscles to bone
  5. 10. Part of the skeletal system that protects the brain
Down
  1. 1. The bone in the center of the chest
  2. 3. It is the largest part of the human brain
  3. 5. Something that joins bone to bone
  4. 6. The round, colored part of the eye present behind cornea
  5. 8. The type of muscles that we can control