The lumbar vertebrae are the largest movable bones of the backbone. Their large size and bone strength is necessary because these vertebrae support more weight than the upper two segments of the ...

The spine (aka backbone) is a linked column of bones running from the head down to the lower back. Bone segments form the column. One bone segment is a vertebra, and multiple bone segments are ...

The spine, or backbone, is made up of small bones (vertebrae) stacked -- along with discs -- one on top of another. A healthy spine, when viewed from the side, has gentle curves to it. The curves help ...