Memory Game medical terminology word rootOnline version to know more about root words in skeletal system by mohamed said -sacr- -petr- -lumb- Cranium Vertebral spine, vertebral column Sacrum -rachi- -crani- Relating to the lumbar region of the spine Relating to the petrous portion of the temporal bone -pelv/i- Ribs Clavicle, collarbone Pelvis, pelvic bone Sternum, breastbone -clavic- / -clavicul- Vertebra, spine, vertebral column -spondyl- / - vertebr- -stern- -cost-