selkärankan

Selkäranka is a Finnish word that translates to "spine" or "vertebral column" in English. It refers to the series of bones, known as vertebrae, that run down the back of many vertebrates, including humans. The spine serves several critical functions within the body.

Primarily, the selkäranka provides structural support, forming the central axis of the skeleton and enabling an upright posture. It protects the spinal cord, a vital bundle of nerves that transmits signals between the brain and the rest of the body. The flexibility of the selkäranka allows for a wide range of movements, such as bending, twisting, and turning.

The human selkäranka is typically divided into several regions: the cervical spine (neck), thoracic spine (upper back), lumbar spine (lower back), sacrum, and coccyx (tailbone). Each region has a specific number of vertebrae and plays a distinct role in supporting the body and facilitating movement. Various muscles, ligaments, and intervertebral discs work in conjunction with the selkäranka to ensure its stability and mobility. Conditions affecting the selkäranka can lead to pain, stiffness, and impaired function.