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