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turbinate - olfactory epitheliumOverview

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thumbnail olfactory epithelium 4x thumbnail olfactory epithelium 10x
thumbnail olfactory epithelium 20x thumbnail olfactory epithelium 40x

The posterior portion of the nasal cavity contains convoluted structures formed by a bone core (nasal turbinates or conchae), which play a part in heating the inhaled air and perceiving olfactory senses. The posterior nasal cavity is lined by olfactory epithelium (pseudostratified columnar epithelium), which contains olfactory receptor cells (bipolar neurons). The cilia of olfactory receptor cells contain chemoreceptors; their axons bundle together to form the olfactory nerves, which project to the olfactory bulb. In Chapter 9. Nervous System, the olfactory bulb is illustrated in detail. The olfactory receptor cells, olfactory nerves, and olfactory bulbs make up the main olfactory system. The posterior nasal cavity also contains part of the accessory olfactory system, the vomeronasal organ (Jacobson’s organ). In Chapter 10. Sense Organs, the vomeronasal organ is depicted in detail.

The micrographs are transversal sections of a decalcified head. The 4X micrograph depicts the nasal turbinates lined with the olfactory epithelium, which is pseudostratified columnar epithelium. The 10X micrograph shows the olfactory epithelium and the bone and cartilage tissues of the turbinates. The 20X and 40X micrographs present details of the olfactory epithelium and the bundles of olfactory nerves in the lamina propria underlying the olfactory epithelium.

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