What comprises the central nervous system (CNS)?

The central nervous system (CNS) is primarily composed of the brain and spinal cord. Together, these structures serve as the main control center for processing information, coordinating activity, and integrating sensory data received from the peripheral nervous system. The brain is responsible for higher functions such as thought, emotion, and motor function, while the spinal cord facilitates communication between the brain and the rest of the body through the transmission of nerve signals.

Other options mentioned do not fully represent the CNS. For instance, while the cerebellum is a component of the brain and plays a role in motor control, it doesn't encompass the entire central nervous system like the brain and spinal cord do. The cerebrum, another part of the brain, and meninges, which are protective membranes covering the brain and the spinal cord, do not alone constitute the CNS either. The meninges provide essential protection and support but are not a part of the CNS itself. Thus, identifying the CNS as comprising solely the brain and spinal cord is accurate, as they are fundamental components responsible for the core functions of the central nervous system.