Central nervous system

Brain and spinal cord / From Wikipedia, the free encyclopedia

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The central nervous system (CNS) is the part of the nervous system consisting of the brain and spinal cord, the retina and optic nerve, and the olfactory nerve and epithelia. The CNS is so named because the brain integrates the received information and coordinates and influences the activity of all parts of the bodies of bilaterally symmetric and triploblastic animals—that is, all multicellular animals except sponges and diploblasts. It is a structure composed of nervous tissue positioned along the rostral (nose end) to caudal (tail end) axis of the body and may have an enlarged section at the rostral end which is a brain. Only arthropods, cephalopods and vertebrates have a true brain, though precursor structures exist in onychophorans, gastropods and lancelets.

Quick facts: Central nervous system, Details, Lymph, Ident...
Central nervous system
1201_Overview_of_Nervous_System.jpg
Schematic diagram showing the central nervous system in yellow, peripheral in orange
Details
Lymph224
Identifiers
Latinsystema nervosum centrale
pars centralis systematis nervosi[1]
Acronym(s)CNS
MeSHD002490
TA98A14.1.00.001
TA25364
FMA55675
Anatomical terminology
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The rest of this article exclusively discusses the vertebrate central nervous system, which is radically distinct from all other animals.

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