MedicineNet does not provide medical advice, diagnosis or treatment. See additional information. The hair follicle is an organ found in mammalian skin. a small anatomical cavity or deep narrow-mouthed depression; a small lymph node… See the full definition Please tell us where you read or heard it (including the quote, if possible). Browse the use examples 'hair follicle' in the great English corpus. A hair follicle is a tunnel-shaped structure in the epidermis (outer layer) of the skin. Like you now, You’re looking for fresh ideas regarding Hair Follicle Definition right? The hair follicle transforms the keratin present in the hypodermis or dermis into hair, through the process of keratinization. Every piece of hair on your scalp has two major parts: the shaft and the follicle. Information and translations of hair follicle in the most comprehensive dictionary definitions resource on the web. Definition - What does Hair Follicle Drug Testing mean? "The human hair follicle is a dynamic structure that generates hair through a complex and exquisitely regulated cycle of growth and remodelling governed by numerous genes," Siobhán A. Jordan has noted in Molecular Medicine Today. The hair bulb generates the hair … An average adult has about ________ square feet of skin. Hair Follicle. Hair Follicle A tube-like invagination of the EPIDERMIS from which the hair shaft develops and into which SEBACEOUS GLANDS open. n. A deep narrow pit that is formed by the tubular infolding of the epidermis and that encloses the root of the hair. A curved hair follicle, which produces tightly curled hair, is believed to encourage the hair to re-enter the skin once the hair is cut and starts to grow back. Send us feedback. The follicle is lined by cells derived from the epidermal (outside) layer of the skin. The shaft is the flowing strand that's seen on your head. All-natural bristle hairbrushes are gentle, but if your hair is thinning or especially fragile, look for a softer cut of bristle. This type of hair loss is believed to be caused by elevated levels of the male hormone Dihydrotestosterone (DHT). Hair Follicle Definition – Looking for fresh thoughts is among the most fun activities however it can as well be annoyed whenever we could not get the wished plan. glandulae sebaceae, sebaceous follicle, sebaceous gland - a cutaneous gland that secretes sebum (usually into a hair follicle) for lubricating hair and skin. ©1996-2020 MedicineNet, Inc. All rights reserved. We have termed these cells as hair-follicle-associated pluripotent (HAP) stem cells. Hair follicle drug testing is a method used to detect the presence of drugs in a shaft of hair. “Hair follicle.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hair%20follicle. So, basically, hair is a characteristic of all mammals. Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free! Hair follicle definition: a narrow tubular cavity that contains the root of a hair, formed by an infolding of the... | Meaning, pronunciation, translations and examples A daily challenge for crossword fanatics. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. They occur abnormally in the tumors known as melanomas and may be excreted in the urine when such tumors are present (melanuria). One of the key differences between human and animal hair is the core of the hair follicle. hair follicle definition in the English Cobuild dictionary for learners, hair follicle meaning explained, see also 'hair care',hair shirt',hair stylist',bad hair day', English vocabulary The hair follicle is lined by a cellular inner and outer root sheath of epidermal origin and is invested with a fibrous sheath derived from the dermis. 'All Intensive Purposes' or 'All Intents and Purposes'? home / medterms medical dictionary a-z list / follicle, hair definition Medical Definition of Follicle, hair Medical Author: Melissa Conrad Stöppler, MD Hair follicle anatomy. Learn a new word every day. Follicle definition is - a small anatomical cavity or deep narrow-mouthed depression. hair follicle Definition Englisch, hair follicle Bedeutung, Englisch Definitionen Wörterbuch, Siehe auch 'camel hair',crepe hair',good hair',guard hair', synonyme, biespiele It can be isolated to one hair follicle or affect many. A hair follicle is a stocking-like structure that contains cells and connective tissue and surrounds the root of a hair. This plug or blockage is called a comedo. Learn the definition of 'hair follicle'. For example, terminal hairs grow on the scalp and lanugo hairs are seen covering the bodies of fetuses in the uterus and in some Hair follicle: A sac from which a hair grows and into which the sebaceous (oil) glands open. follicle definition: 1. any of the very small holes in the skin, especially one that a hair grows from 2. any of the…. Hair follicle epidermal stem cells are heterogeneous in their molecular and functional properties and compartmentalized along the longitudinal axis of the hair follicle (Solanas and Benitah, 2013). The follicle is lined by cells derived from the epidermal (outside) layer of the skin. Hair Follicle . sebaceous follicle a hair follicle with a relatively large sebaceous gland, producing a relatively insignificant hair. Test your visual vocabulary with our 10-question challenge! Acute cases occur for a short time, while chronic cases are ongoing. 2. Folliculitis is relatively common. Each follicle normally goes through a five-year cycle of growth and rest, with about 90% of the follicles growing hair at any one time, averaging about six inches (15 cm) of growth per year. Definition of hair follicle in the Definitions.net dictionary. All acne papules begin as a comedo. While the egg cell matures, its follicle secretes a hormone that stimulates the uterus to develop a lining of blood vessels and soft tissue called endometrium. Hair transplantation is a surgical technique that removes hair follicles from one part of the body, called the 'donor site', to a bald or balding part of the body known as the 'recipient site'. Rosemary Slippery Words Quiz—Changing with the Times. Terms of Use. follicle meaning: 1. any of the very small holes in the skin, especially one that a hair grows from 2. any of the…. Ovulation phase (day 14) On the 14th day of the cycle, the pituitary gland secretes a hormone that causes the ovary to release the matured egg cell. Fur is a reference to the hair of animals. Hair structure and direction of growth play a role in ingrown hairs. ‘Eventually the hair follicle dies and the hair is permanently lost.’ ‘They result when oil, dead skin cells and bacteria trapped in the hair follicle cause it to swell and eventually burst.’ ‘Tiny needles are inserted into the hair follicle followed by an electrical charge that damages it, causing it to stop producing hair.’ Define hair follicle. Hair follicle definition is - the tubular epithelial sheath that surrounds the lower part of the hair shaft and encloses at the bottom a vascular papilla supplying the growing basal part of the hair with nourishment. Salicylic acid dries out excess oil and dead skin cells that can get caught in the hair follicle and cause breakouts. Our guide helps you determine which curl pattern you have & the best type of natural hair products you should be using. When a person uses drug, the chemicals in the substances are are metabolized by his or her body and circulated through the blood stream. Meaning of hair follicle. Other articles where Hair follicle receptor is discussed: senses: Mechanical senses: …first three, free nerve endings, hair follicle receptors, and Meissner corpuscles, respond to superficial light touch; the next two, Merkel endings and Ruffini endings, to touch pressure; and the last one, Pacinian corpuscles, to vibration. Hair Anatomy – Shaft, Follicle Shapes & Sizes. For a helpful visual, think of the hair follicle as a vase and the hair as the stem of a flower. , through the process of keratinization dead skin cells that can get caught in the dermal of. The keratin present in the hair of animals small anatomical cavity or deep narrow-mouthed depression ; a lymph. Epidermis, the more the number of sebaceous glands open every piece of follicle! 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