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The olfactory epithelium is a specialized epithelial tissue inside the nasal cavity that is involved in smell.In humans, it measures 5 cm 2 (0.78 sq in) [1] and lies on the roof of the nasal cavity about 7 cm (2.8 in) above and behind the nostrils. [2]
The epithelium of the nasal mucosa is of two types – respiratory epithelium, and olfactory epithelium differing according to its functions. In the respiratory region it is columnar and ciliated. [3] [4] Interspersed among the columnar cells are goblet or mucin cells, while between their bases are found smaller pyramidal cells.
Olfactory glands, also known as Bowman's glands, are a type of nasal gland situated in the part of the olfactory mucosa beneath the olfactory epithelium, that is the lamina propria, a connective tissue also containing fibroblasts, blood vessels and bundles of fine axons from the olfactory neurons.
The area of olfactory epithelium, in the upper nasal cavity, contains specialised olfactory cells responsible for this function. The nose is also involved in the function of speech. Nasal vowels and nasal consonants are produced in the process of nasalisation. The hollow cavities of the paranasal sinuses act as sound chambers that modify and ...
The olfactory segment is lined with a specialized type of pseudostratified columnar epithelium, known as olfactory epithelium, which contains receptors for the sense of the smell. This segment is located in and beneath the mucosa of the roof of each nasal cavity and the medial side of each middle turbinate.
The olfactory mucosa is the neuroepithelial mucosa [1] lining the roof and upper parts of the septum and lateral wall of the nasal cavity [1] [2] which contains bipolar neurons of the primary receptor neurons of the olfactory pathway, as well as supporting cells.
The first stop in the olfactory system is the olfactory epithelium, or tissue resting on the roof of the nasal cavity which houses smell receptors. Smell receptors are bipolar neurons that bind odorants from the air and congregate at the olfactory nerve before passing axons to the dendrites of mitral cells in the olfactory bulb. [3]
A sustentacular cell is a type of cell primarily associated with structural support, they can be found in various tissues. [1] Sustentacular cells of the olfactory epithelium (also called supporting cells or Sertoli cells) have been shown to be involved in the phagocytosis of dead neurons, [2] odorant transformation [3] and xenobiotic ...