+25 L Vertebrae References. Web the lumbar spine comprises the lower end of the spinal column between the last thoracic vertebra (t12) and the first sacral vertebra (s1). The fifth lumbar vertebra (or the l5 vertebra) is the largest and most inferior of the lumbar vertebrae.
Web functions of vertebrae include: It is part of the axial skeleton and extends from the base of the skull to the tip of the coccyx. The spinal cord runs through its center.
