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The hair follicle is an organ found in mammalian skin. [ 1 ] It resides in the dermal layer of the skin and is made up of 20 different cell types, each with distinct functions. The hair follicle regulates hair growth via a complex interaction between hormones, neuropeptides, and immune cells. [ 1 ] This complex interaction induces the hair ...
Anatomy of the hair shaft and bulb. The word "hair" usually refers to two distinct structures: the part beneath the skin, called the hair follicle, or, when pulled from the skin, the bulb or root.
Root tip, showing young root hairs. Root hair, or absorbent hairs, are outgrowths of epidermal cells, specialized cells at the tip of a plant root. They are lateral extensions of a single cell and are only rarely branched. They are found in the region of maturation, of the root. Root hair cells improve plant water absorption by increasing root ...
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.
Inner root sheath. 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]
Both trichomes and root hairs, the rhizoids of many vascular plants, are lateral outgrowths of a single cell of the epidermal layer. Root hairs form from trichoblasts, the hair-forming cells on the epidermis of a plant root. Root hairs vary between 5 and 17 micrometers in diameter, and 80 to 1,500 micrometers in length (Dittmar, cited in Esau ...
FMA. 59160. Anatomical terminology. [edit on Wikidata] A sebaceous gland or oil gland[1] is a microscopic exocrine gland in the skin that opens into a hair follicle to secrete an oily or waxy matter, called sebum, which lubricates the hair and skin of mammals. [2] In humans, sebaceous glands occur in the greatest number on the face and scalp ...
Hair plexus. Hair plexus. A hair plexus or root hair plexus is a special group of nerve fiber endings and serves as a very sensitive mechanoreceptor for touch sensation. Hair contains a number of different types of nerve endings. They are specialized for the detection of different kinds of stimuli and thus different types of neuron innervate ...