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. 2017 Feb 17:805–907.e1. doi: 10.1016/B978-0-323-35775-3.00014-X

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Copyright © 2017 Elsevier Inc. All rights reserved.

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Figure 14-4 — Neuron Structure.

A, Basic cell biology and structure of neurons are similar to other cells in the body. Additionally, neurons have dendritic arborizations and an axon, specializations for the initiation, propagation, and transmission of impulses that underlie the basic function of these cells. B, The cytoplasm of the neuronal cell body has blue (basophilic [H&E stain]) granular material (rough endoplasmic reticulum) called Nissl substance (arrows). Nissl substance synthesizes proteins, including precursor neurotransmitter proteins and the structural proteins (neurofilaments), active in maintaining the integrity (length and diameter) of the axon. H&E stain. rER, Rough endoplasmic reticulum.

(A courtesy Dr. A.D. Miller, College of Veterinary Medicine, Cornell University; and Dr. J.F. Zachary, College of Veterinary Medicine, University of Illinois. B courtesy Dr. J.F. Zachary, College of Veterinary Medicine, University of Illinois.)