Medulla spinalis, also known as spinal cord in English, is a vital organ in the human body. It transmits messages between the brain and the peripheral nervous system, which is responsible for the body's functions and movements. Synonyms for medulla spinalis include the spinal cord, spinal marrow, and vertebral cord. The cord-like structure is made up of neurons that extend from the brain stem to the lumbar region. The medulla spinalis also contains the spinal reflexes responsible for our reflex actions, such as pulling away from a hot surface. Understanding the functions and synonyms of this important organ can help us appreciate the complexity and wonders of the human body.