ocr: mobility of the spine Spine The spine is the basis 70 cervical vertebae of the trunk. It consists vertebrae vertebrae. of33-34 cervcales - CI-CVI 12 dorsal vertebae vertebrae thoraacae TI-T XII 5 lumbar vertebae vertebrae umbalesLI-LV sacrum The sacrum evolved The coccyX evolved from 5 vertebrae from 4 vertebrae coccyX