The spinal cord is a vital part of the central nervous system that runs from the brainstem down through the vertebral column. It transmits nerve signals between the brain and the rest of the body and plays a key role in reflex actions. Surrounded and protected by vertebrae, the spinal cord contains white and gray matter, spinal nerves, and cerebrospinal fluid. This illustration or image clearly highlights the structure, function, and location of the spinal cord, making it suitable for medical education, anatomy courses, biology textbooks, and healthcare visuals.