anatomical system nervous system A regulatory system of the body that consists of neurons and neuroglial cells. The nervous system is divided into two parts, the central nervous system (CNS) and the peripheral nervous system (PNS). (Source: BioGlossary, www.Biology-Text.com)[TAO] AAO:0000324 Anatomical system consisting of nerve bodies and nerve fibers which regulate the response of the body to external and internal stimuli.[AAO] BILA:0000079 BTO:0001484 CALOHA:TS-1313 EFO:0000802 EHDAA2:0001246 EHDAA:826 EMAPA:16469 EV:0100162 FBbt:00005093 FMA:7157 GAID:466 MA:0000016 MAT:0000026 MESH:D009420 MIAA:0000026 Nervous systems evolved in the ancestor of Eumetazoa.[well established][VHOG] OpenCyc:Mx4rvViT_pwpEbGdrcN5Y29ycA TAO:0000396 The nervous system is an organ system containing predominantly neuron and glial cells. In bilaterally symmetrical organism, it is arranged in a network of tree-like structures connected to a central body. The main functions of the nervous system are to regulate and control body functions, and to receive sensory input, process this information, and generate behavior [CUMBO]. UMLS:C0027763 VHOG:0000402 WBbt:0005735 XAO:0000177 ZFA:0000396 nerve net neurological system systema nervosum