This page explains the division of the nervous system into the central (CNS) and peripheral nervous systems (PNS). The PNS is further categorized into the sensory-somatic and autonomic systems, which ...This page explains the division of the nervous system into the central (CNS) and peripheral nervous systems (PNS). The PNS is further categorized into the sensory-somatic and autonomic systems, which include cranial and spinal nerves for sensory and motor functions. The autonomic nervous system splits into sympathetic (emergency response) and parasympathetic (restoration) systems, relying on neurotransmitters like acetylcholine and noradrenaline.