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Cell types and their morphologies in the olfactory epithelium

Cajal drawing illustrating the cell types and their morphologies in the olfactory epithelium. Legend: Olfactory sensory neuron components: (n) nucleus, (b) dendrite, (c) apical cilia, (a) axon, (d) olfactory sensory neuron axons bundle, (e) supporting or sustentacular cell. The drawing shows the handwriting of Cajal with specific instructions for the required reduction publication factor in the margins. (Source: Instituto Cajal, Madrid, Spain. Figueres-Oñate M, Gutiérrez Y, López-Mascaraque L. Unraveling Cajal's view of the olfactory system. Front Neuroanat 2014;8:55. Creative Commons Attribution [CC BY] license, creativecommons.org/licenses/by/4.0.)