The main weight of the body is carried by the lumbar vertebral bodies and disks. The lamina, facets and spinous process are major parts of the posterior elements that help guide the movement of the vertebrae and protect the spinal nerves.
Spinal nerve emerges above the seventh cervical vertebra; spinal nerve emerges below it. The subsequent spinal nerves all emerge below their corresponding vertebrae. Atypical thoracic vertebrae are and