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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 about 3 square centimeters (on each side) and lies on the roof of the nasal cavity about 7 cm above and behind the nostrils. The olfactory epithelium is the part of the olfactory system directly responsible for detecting odors. ==Layers of olfactory epithelium== Olfactory epithelium consists of four distinct cell types:〔Ross, MH, ''Histology: A Text and Atlas'', 5th Edition. Philadelphia: Lippincott, Williams and Wilkins, 2006. page 615-616.〕 * Olfactory cells * Supporting cells * Basal cells * Brush cells 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「olfactory epithelium」の詳細全文を読む スポンサード リンク
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