…Every hair has a sebaceous gland opening close to it, which secretes a sebaceous fluid that moistens the hair surface. Microscopic examination of a single hair reveals that it is made up of epidermal cells that have undergone varying degrees of keratinization. For convenience, hair is often divided into three layers: the medulla, the cortex, and the cuticle. … *Some of the terminology that refers to "keratinizing degeneration" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…すべての毛には皮脂腺開口部が近接しており,この腺からの脂性分泌物が毛の表面を潤している。単一の毛を顕微鏡で調べると,さまざまな程度に角質化変性を遂げた表皮細胞群で毛がつくられているのがわかる。毛は便宜上,毛髄質,毛皮質,毛小皮(キューティクル=クチクラ)の3層に区別されることが多い。… ※「角質化変性」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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