Across
- 2. bone in the upper arm
- 4. joint in neck
- 6. protected by skull
- 8. pairs of ribs
- 10. flat bone in the chest
Down
- 1. joint in knee
- 3. spinal cord is protected by it
- 5. a bone in backbone
- 6. made up of calcium and phosphorus
- 7. join in ankle
- 9. longest bone