骨骼系統的疾病 　 脊 柱 強 直 症 頸 椎 退 化 骨 質 疏 鬆 症 Skeletal System 　 1. Skull 2. Sternum 3. Ribs 4. Vertebrae 5. Sacrum 6. Lower Limb Bones 7. Supporting Bones (Hip) 8. Upper Limb Bones 9. Supporting Bones (Scapula and Collarbone)