The inner root sheath (IRS) consists of: a delicate cuticle next the hair, composed of a single layer of imbricated scales with atrophied nuclei; Huxley's layer; Henle's layer; The term "trichilemmal" refers to the outer root sheath. [2] The IRS functions to mould, adhere, as well as participate in the keratinization of growing hair. [3]

The internal root sheath is a layer composed of lightly keratinized cells which envelops the lower portion of the hair shaft, it does not extend past the isthmus (the middle segment) of the hair follicle. This layer and the external root sheath are produced by the rapidly reproducing matrix cells found in the periphery of the follicular bulb.

2023年10月30日 · A hair follicle consists of two main layers, an inner (epithelial) root sheath and an outer (fibrous) root sheath. At the base of the hair follicle is the hair bulb, which houses the dermal papillae and hair matrix cells. The hair bulb and inner epithelial layer generates hair.

根鞘（英語： root sheath ），是指毛囊由多层上皮细胞组成的内层，与表皮相延续 [1] 。 根鞘分为两层，外层为 外毛根鞘 ，内层为 内毛根鞘 。 内毛根鞘又可分为三层，外层为 鞘小皮 ，中间层为 赫胥黎层 ，内层为 亨勒层 。

毛囊 （Hair follicle）是用來生長毛髮的皮膚器官，也是哺乳動物唯一終生呈週期性循環的器官，分布在除了手掌、腳掌和嘴唇以外的全身體表皮膚上。 毛囊可以幫助表皮維持機體免受外界環境的損傷，在生理性的組織更新和外傷修復中發揮重要作用 [1]。 目前已有 研究 發現與 立毛肌 接觸 面積 越大的毛囊保持得越持久，而與立毛肌接觸面積越小的毛囊則更容易受到雄激素的 刺激 而轉變為 毫毛 [2]。 哺乳動物 毛囊的基本結構都是相同的。

内毛根鞘 （英語： internal root sheath 或 inner root sheath），简称 内根鞘，是指由 毛囊 上皮根鞘 内层开始角化的细胞构成的结构 [1]。 内毛根鞘分为三层，从内向外依次为 Henle层 、 Huxley层 和 鞘小皮。 Henle层为一层角化的扁平细胞，Huxley层为几层长形细胞，鞘小皮则为一层呈叠瓦状排列的角化小扁形细胞 [2]。 ^ 人体解剖学与组织胚胎学名词审定委员会. 组织学与胚胎学名词. 北京: 科学出版社. 2014: 68 [2020-12-20]. ISBN 978-7-03-040573-9. OCLC 910799822. （原始 …

Root sheath may refer to any of these biological structures: Epithelial root sheath, a proliferation of epithelial cells located at the cervical loop of the enamel organ in a developing tooth; Root sheath (hair), at the base of a hair follicle Inner root sheath; Outer root sheath; Seed root sheath, root sheaths in the seeds of plants

根鞘（root-sheath，epidermal sheath），是组成 毛囊 的部分，有外根鞘和内根鞘。 有外根鞘（outer root-sheath）和内根鞘（in-ner root-sheath）。 毛囊 由内毛根鞘、外毛根鞘和毛球组成，内毛根鞘在毛发生长期后期是与头发直接相邻的鞘层。 内毛根鞘的硬直的、厚壁角蛋白化的管，它决定 毛发 生长时截面的形状。 内毛鞘下部为三层：HUXLEY鞘、HENLE鞘和内毛根鞘表层。 在 毛发角蛋白 化以前，内毛根鞘与毛发一起生长，其来源均为毛囊底层 繁殖 的细胞。 在接 …

2019年7月27日 · The inner root sheath helps keep the hair fiber firmly glued into the scalp. The outer root sheath (ORS) is continuous with the skin epidermal layer. The epidermal layer essentially dips down to join up with the ORS in the region where hair follicles come out of …

The inner root sheath or internal root sheath of the hair follicle is located between the outer root sheath and the hair shaft. [1] It is made of three layers: Henle's layer, Huxley's layer, and the cuticle. [2] The inner root sheaf serves to protect growing hair. [3]