Skeletal System

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Across
  1. 2. The process of hard bone replacing cartilage in our skeletal system.
  2. 5. This gives the human body shape and support.
  3. 8. Protects lungs.
  4. 10. Inner part of bone that makes the skeleton lighter and contains bone marrow.
  5. 11. The hardest material in the human body.
  6. 12. A white, rubbery substance in our skeletal system.
Down
  1. 1. The outer part of a bone consists of a hard material called.
  2. 3. There are 206 of these in the adult skeleton.
  3. 4. Manufactures blood cells and stores fat for the body.
  4. 6. Joint that functions like a lever (like your elbow).
  5. 7. Connects bones to bones at the joint.
  6. 9. Protects brain.