A spinal disc is made of two main parts: the nucleus pulposus and the annulus fibrosus.
Components of a Spinal Disc
The spinal disc, crucial for cushioning and movement of the spine, comprises the following:
- Nucleus Pulposus: This is the inner part of the disc. It is a gelatinous substance that acts like a shock absorber. The nucleus pulposus is primarily responsible for the disc's cushioning function.
- Annulus Fibrosus: This is the outer ring of the disc. It is a tough, fibrocartilaginous structure that surrounds the nucleus pulposus. Its main role is to contain and protect the nucleus pulposus, ensuring that it remains intact even when forces are applied to the spine.
Table Summarizing the Components
| Component | Description | Function |
|---|---|---|
| Nucleus Pulposus | Gelatinous, inner core | Provides cushioning and shock absorption |
| Annulus Fibrosus | Fibrocartilaginous, outer ring | Keeps the nucleus pulposus intact, provides strength |
In essence, the nucleus pulposus provides the main cushioning effect, while the annulus fibrosus ensures the structural integrity and protection of the disc by surrounding the nucleus pulposus. According to the provided reference, the annulus fibrosus is the fibrocartilaginous ring that surrounds the nucleus pulposus, keeping it intact when forces are applied to the spinal column.
