Argument

Nervous system

Overview

part of an animal that coordinates actions and senses

Overview adapted from Wikipedia (CC BY-SA 4.0; see the article history for authors).

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The proposed definition of organic life supplies an answer. If organic life be the co-ordination of actions, then an organism may be primarily divided into parts whose actions are co-ordinated, and parts which co-ordinate them--organs which are made to work in concert, and the apparatus which makes them so work--or, in other words, the assimilative, vascular, excretory, and muscular systems on the one hand, and the…
Herbert Spencer, The Principles of Biology, Volume 1
Names Nervous system several times; states what Nervous system is.
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True, when we think of the part played by the nervous system (even the sensori-motor system) as regulator of the organic life, it may well be asked whether, in this exchange of good offices between it and the rest of the body, the nervous system is indeed a master that the body serves. But we shall already incline to this hypothesis when we consider, even in the static state only, the distribution of potential…
Henri Bergson, Creative Evolution
States what Nervous system is; names Nervous system several times.
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Fig. 1, Nervous system of _Coronula diadema_, seen from the ventral surface. A, infra-œsophageal ganglion; two pairs of rather small nerves, arising from the dorsal surface, cannot be here shown. B, supra-œsophageal ganglion, double. C, ophthalmic ganglion, single. D D, eyes, as believed to exist.
Charles Darwin, A Monograph on the Sub-class Cirripedia
The chapter “NERVOUS SYSTEM AND SENSES.” is titled for Nervous system; names Nervous system twice.
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Nervous system

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