Spinal Cord:The spinal cord is a long, thin, tubular structure made up of nervous tissue, which extends from the medulla oblongata in the brainstem to the lumbar region of the vertebral column.
Central Nervous System (CNS): The central nervous system consists of the brain and spinal cord, serving as the main processing center for the entire nervous system.
Posterior Median Sulcus: A shallow groove along the back (posterior) part of the spinal cord, opposite to the anterior median fissure, also contributing to dividing it into two halves