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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 olfactory epithelium is the part of the olfactory system directly responsible for ...
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 ...
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.
The proportion of olfactory epithelium compared to respiratory epithelium (not innervated, or supplied with nerves) gives an indication of the animal's olfactory sensitivity. Humans have about 10 cm 2 (1.6 sq in) of olfactory epithelium, whereas some dogs have 170 cm 2 (26 sq in). A dog's olfactory epithelium is also considerably more densely ...
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.
A study conducted in 2023 found that hairdressers who were exposed to formaldehyde, an ingredient found in hair dye, experienced olfactory loss when protective equipment was not used. [37] These agents not only damage the olfactory epithelium, but they are likely to enter the brain via the olfactory mucosa. [38]
A police officer who fatally shocked a 95-year-old woman with a Taser in an Australian nursing home has been found guilty of manslaughter after the jury found that the great-grandmother, who was ...
In embryology, the nasal placode (or olfactory placode [1]) gives rise to the olfactory epithelium of the nose. Two nasal placodes arise as thickened ectoderm from the frontonasal process . They give rise to the nose , the philtrum of the upper lip , and the primary palate .