Which part of the body does the spinal cord belong to?

The spinal cord is an essential component of the central nervous system (CNS). It functions as a major pathway for transmitting information between the brain and the rest of the body. The CNS consists of the brain and spinal cord, together enabling the processing of sensory information, coordination of motor activities, and regulating reflexes. Understanding the role of the spinal cord within the CNS highlights its significance in overall neurological function, as it not only relays messages but also plays a crucial role in reflex actions and certain involuntary functions. Each of the other systems listed, such as the peripheral nervous system, circulatory system, and skeletal system, serve distinct purposes and include different structures, but they do not encompass the spinal cord itself as part of their anatomy. This illustrates the specific and vital role of the spinal cord within the central nervous system.