välilevylle
Välilevy, often referred to as an intervertebral disc, is a complex structure found between the vertebrae of the spine. It acts as a shock absorber, cushioning the impact of daily activities like walking, running, and lifting. Each välilevy consists of two main parts: the annulus fibrosus, a tough outer layer of cartilage, and the nucleus pulposus, a gelatinous inner core. This unique composition allows the välilevy to withstand significant pressure and maintain the spine's flexibility.
The välilevy's health is crucial for spinal function. Over time, or due to injury, the välilevy can