What are the two main parts of the nervous system?

The two main parts of the nervous system are indeed the central and peripheral nervous systems. The central nervous system (CNS) consists of the brain and spinal cord, which serve as the processing center for the entire body. The CNS is responsible for integrating sensory information and coordinating responses.

On the other hand, the peripheral nervous system (PNS) includes all the nerves that branch out from the brain and spinal cord to the rest of the body. It connects the CNS to limbs and organs, facilitating communication between them and the CNS. The PNS is further divided into the somatic nervous system, which controls voluntary movements, and the autonomic nervous system, which regulates involuntary functions. However, such divisions fall under the broader categories of the central and peripheral systems.

Understanding these two main components is crucial in comprehending how the body processes information and responds to various stimuli, which is vital knowledge in the field of cosmetology where sensory perception plays a significant role.