Which collective tissue makes up the inter-vertebral discs?

I tried looking it up in my book everywhere and on the net. Does anyone know what could it be?Which collective tissue makes up the inter-vertebral discs?Each intervertebral disk consists of a hard outer layer which surrounds and keeps intact a soft gelatinous interior. The outer layer is a fibrocartilaginous ring, called the annulus fibrosus, in which the cartilage fibers are arranged in concentric lamellae. The collagen bundles pass obliquely between adjacent vertebral bodies, and their inclination is reversed in alternate lamellae. The more peripheral fibers are strongly attached to the anterior and posterior longitudinal ligaments of the vertebral column.



The inner core, known as the nucleus pulposus, serves to cushion the vertebrae during movements of the spine. In children, the nucleus pulposus an ovoid mass of gelatinous material containing a large amount of water, a small number of collagen fibers, and a few cartilage cells. It is normally under pressure and situated slightly nearer to the posterior than to the anterior margin of the disk.



The upper and lower surfaces of the bodies of adjacent vertebrae that abut onto the disk are covered with thin plates of hyaline cartilage.