structure of an intervertebral disk

accessory anatomical anatomy anulus arch articular biology board body bodybuilding bone bones bony boy collagen column costal crossing didactic disk fiber fibers fibrosus fibrous foramen human inferior intervertebral lamina ligament lumbar mamillary marginal medical medically medicine model nucleus pedicle physical process proportions pulposus ridge ring science skeletal skeleton spinal spinous sportive structures superior surface system systems transverse trunk vertebrae vertebral wall