How many parts is the nervous system divided into?

The nervous system is primarily divided into two main parts: the central nervous system (CNS) and the peripheral nervous system (PNS). The central nervous system comprises the brain and spinal cord, which are responsible for processing and transmitting information. The peripheral nervous system includes all the nerves that branch out from the central nervous system to all other parts of the body, playing a critical role in sending sensory information to the CNS and carrying out motor commands.

Understanding this division is essential for grasping how the nervous system functions and how different parts communicate with each other in controlling bodily functions, movement, and response to the environment. Recognizing these two primary components lays the foundation for further study of the nervous system's complex interactions and physiological processes.