单词 | nerve net |
释义 | > as lemmasnerve net nerve net n. Zoology a diffuse network of neurons found in cnidarians, flatworms, and certain other invertebrates, which transmits impulses in all directions from a point of stimulation. ΘΚΠ the world > animals > animal body > general parts > constituent materials > [noun] > network of nerves nerve net1904 1904 C. S. Sherrington in Nature 8 Sept. 460/1 We can distinguish two main types of [nervous] system according to the mode of union of the conductors.—(i.) the nerve-net system, such as met in Medusa and in the walls of viscera, and (ii.) the synaptic system, such as the cerebro-spinal system of Arthropods and Vertebrates. 1942 O. Larsell Anat. Nerv. Syst. i. 3 The older view of the nerve net as a conduction apparatus for diffusing nerve impulses by protoplasmic continuity of the nerve cell processes has largely yielded to the conception of a synaptic system, even in coelenterates. 1987 M. S. Laverack & J. Dando Lect. Notes Invertebr. Zool. (ed. 3) xxvii. 159/1 The epidermal nerve net conducts equally and decrementally in all directions. 2002 R. Chase Behavior & Neural Control Gastropod Molluscs iv. 59 The term ‘nerve net’..denotes a specific type of plexus, namely, a system of neurons dispersed in a plane and connected by fusion or synapses. < as lemmas |
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