At this stage, the sclerotome of the somite create the mesenchymal cells in three major areas including the body wall, in the notochord and adjacent the neural tube (Christ & Wilting, 1992). The cartilaginous stage is the second phase of the embryology of the vertebrae column, which takes place during the sixth week. At this stage, a cartilaginous centrum is created through the fusion of two centers in evert centrum. Also, there is a fusion between the centrum and centers found in the vertebral arches (Kaplan, Spivak, & Bendo, …show more content…
Also, the vertebral arch contains a brace of pedicles as well as a brace of laminae, which are beneficial in supporting seven processes including two transverse, four articular, and one spinous (Verbout, 1984). The body creates a strong pillar that is meant to offer support to the trunk and head when the typical vertebrae are linked with each other. Additional features of typical vertebrae include a vertebral canal which is a tube that is created when the vertebral foramen is stacked (Beamer, Shultz, Donahue, Churchill, Sen, Wergedal & Rosen, 2001). The lateral projection in typical vertebrae helps in the attachment of the muscle and tendons inside the backbone. On the other hand, the lumbar vertebral structure contains five vertebrae that are moveable and labeled L1-L5, which is a bit larger than other bones and is positioned in the lower back. Therefore, lumbar vertebral contains a composite structure because of the remarkable combination of the strong vertebrae, numerous bony features connected by combined capsules, and muscles or ligaments that are flexible. The lumbar vertebral structure is designed to be strong and has sensitive nerves to protect the spinal cord as well as spinal nerve roots which are extremely sensitive (Beamer et.al