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Anatomy Atlases: Atlas of Microscopic Anatomy: Section 1 - Cells Atlas of Microscopic Anatomy: Section 16 - Special Senses

Plate 16.298 Olfactory Epithelium

Ronald A. Bergman, Ph.D., Adel K. Afifi, M.D., Paul M. Heidger, Jr., Ph.D.
Peer Review Status: Externally Peer Reviewed

Bipolar receptor neurons

Plate 16.298 Olfactory Epithelium

Dog, 10% formalin, silver diaminohydroxide, 500 x.


In this plate, a special staining technique is used to demonstrate the olfactory receptor (bipolar) neurons in the olfactory mucosa.

The nuclei of the receptor cells are usually deeply located in the epithelium. From the nuclear region of the neuron, a delicate peripheral neural process reaches the exposed surface of the epithelium. At the opposite pole of the cell, an unmyelinated axon extends centrally. The axons of receptor cells are gathered together to form the olfactory nerve (cranial nerve 1). The olfactory nerve terminates in the olfactory bulb, where synaptic contacts are established with neurons, whose axons form the olfactory tract.

The olfactory bipolar neurons are located between the more numerous sustentacular cells, which are seen in Plate 297.  

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