What are the two main parts of the nervous system?

The two main parts of the nervous system are the Central and Peripheral Nervous Systems. The Central Nervous System (CNS) consists of the brain and spinal cord, which serve as the control center for processing information and sending signals throughout the body. The Peripheral Nervous System (PNS) includes all the nerves that branch out from the CNS to the rest of the body, connecting the CNS to limbs and organs. This division allows for complex communication pathways, making it essential for functioning, movement, and responding to environmental stimuli.

Understanding this distinction is important because it lays the foundation for how we comprehend nervous system functions, such as reflex actions and sensation processing. The other options refer to components or divisions that are either subsets of these main categories or describe functions within the system rather than the primary structural divisions.