GeoByte1:Disks of cartilage can slip out of their correct position between the vertebrae and press against nerves. A "slipped disk" often causes severe back pain.
GeoByte2:The bones of the back, chest and head make up the ^axial skeleton^.
GeoByte3:The spinal nerves pass through openings in the vertebrae.
GeoByte4:The shape of the spine, an S-curve, helps distribute weight among the vertebrae.
GeoByte5:The five lumbar vertebrae are the vertebrae of the lower back.