Which two systems are the main components of the nervous system?

The correct answer identifies the two primary components of the nervous system as the central nervous system (CNS) and the peripheral nervous system (PNS).

The central nervous system consists of the brain and spinal cord, serving as the main control center for processing information and coordinating responses throughout the body. It is responsible for higher cognitive functions, movement, sensory processing, and autonomic functions.

The peripheral nervous system connects the CNS to the rest of the body, comprising all the nerves outside the CNS. It has two major divisions: the sensory (afferent) division, which carries signals to the CNS about sensory information, and the motor (efferent) division, which sends signals from the CNS to muscles and glands to elicit responses.

Together, these two systems enable the body to respond effectively to internal and external stimuli, maintaining communication and coordination across various body functions.

It's important to note that while the endocrine system is involved in bodily regulation, it is not part of the nervous system. The cranial nerves are indeed part of the peripheral nervous system but do not encompass its entire structure. Lastly, the autonomic and somatic systems are subcategories within the peripheral nervous system, further emphasizing the relevance of the central and peripheral systems as