Vahelülisid

Vahelülisid, more commonly known as intervertebral discs, are specialized structures found between the vertebrae of the spine. They act as shock absorbers and allow for movement between the individual bones of the spine. Each intervertebral disc is composed of two main parts: the annulus fibrosus and the nucleus pulposus. The annulus fibrosus is a tough, fibrous outer ring that surrounds and contains the nucleus pulposus. The nucleus pulposus is a soft, gelatinous core that is primarily composed of water and proteoglycans. This structure allows the discs to withstand significant compressive forces and to resist deformation.

The function of intervertebral discs is crucial for spinal health and mobility. They distribute the weight of the upper body across the vertebrae, preventing direct bone-on-bone contact and reducing stress on the spinal column. Their flexibility permits bending, twisting, and other movements of the spine. With age, the discs can undergo degenerative changes, losing water content and becoming less elastic. This can lead to a decrease in height between vertebrae and can contribute to various spinal conditions, such as herniated discs or degenerative disc disease. Maintaining good posture and engaging in regular exercise can help support the health of intervertebral discs.