The spinal column generally resembles a few books stacked up. It is made up of a series of bones (vertebrae) stacked onto each other. From top to bottom, the column includes seven bones in the cervical spine, 12 in the thoracic spine, and five in the lumbar spine, followed by the sacrum and the coccyx at the base. These bones are cushioned by disks. The disks protect the bones by absorbing the shocks from daily activities like walking, lifting, and twisting.