ocr: Mayo Clinic Family Health Disc View Options Window Help - - Skeleton Skull Shoulder Blade (scapula) Cervical Vertebrae Shoulder Joint (upper backbone] Collarbone clavicle] Breastbone (sternum) Ribs Humerus Ulna Costal Cartilage Elbow Joint Radius Lumbar Vertebrae (lower backbone] Sacrum view Illustration NEXT 1 or of 2: PREVIOUS Use buttons to Go to Text Narration Go Back