Hecke, Deuring, Mordell, Heilbronn theorem, (Ireland & Rosen 1990, p. ... The method of proof is interesting, in that the inequality is shown first under the ...... (1983), "Zeros of approximations to the zeta function", in ErdÅs, Paul, Studies in p
Michelangelo: the Representation of Architecture. London: Thames and Hudson. â¢ Trachtenberg, Marvin (1988). What Brunelleschi Saw: Monument and Site at ...
Basic nail anatomy ... The paronychium is the border tissue around the nail and paronychia is an infection in this area. .... Chapter XI, Patient assessment.Missing:
with its old DNA removed; the resulting bacterium will be called Mycoplasma ..... New Life to Bacterium" (http://www.sciencemag.org/cgi/reprint/328/5981/958.pdf). ... to decode Venter's secret DNA watermark" (http://www.arcfn.com/2010/06/.
Childhood. Edvard Munch was born in a rustic farmhouse in the village of Ã dalsbruk in LÃ¸ten, Norway to Christian Munch, the son of a priest. Christian was a doctor and medical officer who married Laura Catherine BjÃ¸lstad, a woman half his age, in
Color Field painting, Lyrical Abstraction, Fluxus, Pop Art, Minimalism, Postminimalism, Neo-expressionism, and the other movements of the sixties and seventies ...
4. , and YBCO. (Yttrium-Barium-Copper-Oxide), which is famous as the first material to achieve superconductivity above the boiling point of liquid nitrogen. Transition temperatures of well-known superconductors (Boiling point of liquid nitrogen for c
Sebaceous gland carcinoma of the ocular ... From the Oncology Service (Drs Honavar, C. L. Shields, J. A. Shields, and Demirci),. Oculoplastics Service (Dr Maus), and Department of Pathology (Dr Eagle), Wills Eye ... .com/pdfaccess.ashx?url=/data/jour
sebum there are unique lipids, such as squalene and wax esters not found anywhere ... tion, antimicrobial activity, delivery of fat-soluble anti-oxidants to the skin ...
via holocrine rupture of individual sebocytes. There ... the increase in sebaceous gland proliferation there is a decrease in the ... What makes the sebocyte .... the cellular and secreted lipids and palmitate was incorporated into all of the fatty-a
meibomian glands and rarely from the gland of Zeis, sebaceous gland of ... to have developed metastasis to preauricular and submandibular lymph nodes.
tions of tumors produced in the bladder, kidney, liver, lungs, and head, although the emphasis was ... pears to be oral, although remote tumors were also produced on parenteral applica- tion. .... The tumor cells are oval or polyhedral in shape.
outcome of sebaceous gland carcinoma (SGC) of the eyelid. MATERIALS ... metastasis to preauricular lymph nodes was seen in 1 case (3.33%). T2 was the ...
In neither case, however, are the practices based on a quantified ... SE management is distinguished from program management in the use of technical ..... spo ndents. NASA. INCOSE. Combined. Figure 11. Percent of Total Project Cost Spent.
dragon tree opposite is thought to represent eternal life. The background reveals ... the events from the Book of Genesis traditionally depicted in Western art". Some of the image's details seem .... amniotic bubble; and a man inside of a red
Sebaceous adenoma is a rather rare developmental anomaly that has been ... Of submandibular neoplasms, pleomorphic adenoma ranks first, as in the parotid ...
the presence of sebaceous tumors and internal malignancies in the absence of other .... noma with a cecal tumor [in French]. J Fr Ophtalmol 1985;8: 479â85. 7.
Sebaceous gland carcinoma (SGC) of ocular adnexa is a ... glands in the tarsus, zeis glands at the eyelid ... and preauricular lymph node metastasis on the.
nation showed a 2.5 x 1.5 cm firm, non-tender mass in the lower pole of the right parotid gland which was confirmed by ultrasound (US). There was no facial ...
Background: Heterotopic sebaceous gland metaplasia (HSGM) of the esophagus ..... ectopic multiple minute sebaceous glands in the esophagus. Report of a.
Jul 15, 2016 - Abstract: Sebaceous gland hyperplasia (SGH) is a benign condition that originates in the ... who presented with an asymmetric labium minus and unilateral vulvar hypertrophy. ... solitary or multiple, yellow, umbilicated papules.
E-mail: [email protected] Recebido para publicaÃ§Ã£o em 19/12/97. .... 2nd edition, Williams & Wilkins, Baltimore, p.33, 1997. 2. Hotez PJ, Narasimhan S, ...
Purpose: To study the sebaceous tumors of eyelid/conjunctiva associated with ..... Sebaceous carcinoma. Cecum carcinoma. Present. Absent. Meier-Gibbons et.
Sebaceous gland Sebaceous gland
Schematic view of hair follicle & sebaceous gland.
Cross-section of all skin layers. A hair follicle with associated structures. (Sebaceous glands labeled at center left.) Latin
subject #234 1069
The sebaceous glands are microscopic glands in the skin which secrete an oily/waxy matter, called sebum, to lubricate the skin and hair of mammals. In humans, they are found in greatest abundance on the face and scalp, though they are distributed throughout all skin sites except the palms and soles. In the eyelids, meibomian sebaceous glands secrete a special type of sebum into tears. There are several related medical conditions, including: acne, sebaceous cysts, hyperplasia, sebaceous adenoma and sebaceous gland carcinoma (see section below: Pathology).
Locations and morphology A branched type of acinar gland, the sebaceous glands exist in humans throughout the skin except in the palms of the hands and soles of the feet. Sebaceous glands can usually be found in hair-covered areas, where they are connected to hair follicles (see image at top). The glands deposit sebum on the hairs, and bring it to the skin surface along the hair shaft. The structure consisting of hair, hair follicle, arrector pili muscle, and sebaceous gland is known as a pilosebaceous unit. Sebaceous glands are also found in non-haired areas (glabrous skin) of eyelids, nose, penis, labia minora, and nipples. Here, the sebum traverses ducts which terminate in sweat pores on the surface of the skin. At the rim of the eyelids, meibomian glands are a specialized form of sebaceous gland. They secrete a form of sebum (called meibum) onto the eye, slowing the evaporation of tears.
Sebum Sebaceous glands secrete the oily, waxy substance called sebum (Latin, meaning fat or tallow) that is made of fat (lipids), wax, and the debris of dead fat-producing cells. In the glands, sebum is produced within specialized cells and is released as these cells burst; sebaceous glands are thus classified as holocrine glands. Sebum is odorless, but its bacterial breakdown can produce odors. Sebum is the cause of some people experiencing "oily" hair, as in hot weather or if not washed for several days. Earwax is partly composed of sebum. Excess sebum has been linked to eating red meats, fried, oily or other foods, but studies are not conclusive.
Function Although it is commonly believed that sebum acts to protect and waterproof hair and skin, scientists have contended that "low levels of sebaceous gland activity are not correlated with dry skin" and it may serve little or no purpose in modern humans.
Composition The composition of sebum varies between species. In humans, the lipid content is as follows: Percent composition Substance 25%
free fatty acids
Sapienic acid is a sebum fatty acid that is unique to humans.
Control The following treatments have been shown to reduce sebum secretion rates: • Isotretinoin • SMT D002 • Spironolactone (suitable for females only)
Changes during development The sebaceous glands of a human fetus in utero secrete a substance called Vernix caseosa, a "waxy" or "cheesy" white substance coating the skin of newborns. The activity of the sebaceous glands increases during puberty because of heightened levels of androgens. In males, sebaceous glands begin to appear predominantly on the penis, on the shaft and around the rim of the penile head during and after puberty. This is however normal, not to be confused with an STD. In females, they appear predominantly in the labia minora.
Pathology Sebaceous glands are involved in skin problems such as acne and keratosis pilaris. In the skin pores, sebum and keratin can create a hyperkeratotic plug called a "microcomedone". The prescription drug isotretinoin significantly reduces the amount of sebum produced by the sebaceous glands, and is used to treat acne. The extreme use (up to 10 times doctor-prescribed amounts) of anabolic steroids by bodybuilders, for muscle gain can cause acne. The sebaceous gland is stimulated due to some steroids conversion into dihydrotestosterone. This may cause serious acne on the face, neck, chest, back and shoulders. A blocked sebaceous gland can result in a sebaceous cyst. A condition involving enlarged sebaceous glands is known as sebaceous hyperplasia. Sebaceous gland carcinoma is a rare and aggressive form of cancer involving the sebaceous glands; sebaceous adenoma is a more benign neoplasm of the sebaceous glands. Sebum can also build up around body piercings.
Importance to other animals Certain species of Demodex mites feed on sebum and are commonly found in the sebaceous glands of mammals, including those of humans. The preputial glands of mice and rats are large modified sebaceous glands that produce pheromones.
Base of pilosebaceous unit
Insertion of sebaceous glands into hair shaft
Sagittal section through the upper eyelid.
A hair follicle with associated structures.
References  http:/ / education. yahoo. com/ reference/ gray/ subjects/ subject?id=234#p1069  http:/ / www. nlm. nih. gov/ cgi/ mesh/ 2007/ MB_cgi?mode=& term=Sebaceous+ glands  Dellmann's textbook of veterinary histology (405 pages), Jo Ann Coers Eurell, Brian L. Frappier, 2006, p.29, weblink: Books-Google-RTOC (http:/ / books. google. com/ books?id=FnS4uiOlRT0C& pg=PA29& lpg=PA29).  James, William D.; Berger, Timothy; Elston, Dirk M. (2006). Andrews' diseases of the skin: clinical dermatology. Saunders Elsevier. p. 7. ISBN 978-0-7216-2921-6.  "Exercise 15: Hair", VT.edu, 2008, webpage: Vetmed-lab15 (http:/ / education. vetmed. vt. edu/ Curriculum/ VM8054/ Labs/ Lab15/ Lab15. htm).  "Hair Care: An Illustrated Dermatologic Handbook", Zoe Diana Draelos, Zoe Kececioglu Draelos, 2005, p.26, web: Books-Google-5QC (http:/ / books. google. com/ books?id=Z2rHHGQc-5QC& pg=PA26& lpg=PA26): oily hair & detergents.  Downing DT, Stewart ME, Wertz PW, Colton SW, Abraham W, Strauss JS (March 1987). "Skin lipids: an update". The Journal of Investigative Dermatology 88 (3 Suppl): 2s–6s. doi:10.1111/1523-1747.ep12468850. PMID 2950180.  Cheng JB, Russell DW (September 2004). "Mammalian wax biosynthesis. II. Expression cloning of wax synthase cDNAs encoding a member of the acyltransferase enzyme family" (http:/ / www4. utsouthwestern. edu/ moleculargenetics/ pdf/ dr_cur_res/ JBiolChem2004-II. pdf). The Journal of Biological Chemistry 279 (36): 37798–807. doi:10.1074/jbc.M406226200. PMID 15220349. PMC 2743083. .  Farrell LN, Strauss JS, Stranieri AM (December 1980). "The treatment of severe cystic acne with 13-cis-retinoic acid. Evaluation of sebum production and the clinical response in a multiple-dose trial". Journal of the American Academy of Dermatology 3 (6): 602–11. doi:10.1016/S0190-9622(80)80074-0. PMID 6451637.  http:/ / www. summitplc. com/ uploads/ RNSSeborrhoeatrialFINAL. pdf  Goodfellow A, Alaghband-Zadeh J, Carter G, et al. (August 1984). "Oral spironolactone improves acne vulgaris and reduces sebum excretion". The British Journal of Dermatology 111 (2): 209–14. doi:10.1111/j.1365-2133.1984.tb04045.x. PMID 6235834.  Playe, Stephen J (July 2002). "Infectious Complications of Body Art: Infection is reported in about 1% of tattoos and in up to 45% of piercings, depending on the technique employed, body location, and after care" (http:/ / journals. lww. com/ em-news/ Citation/ 2002/ 07000/ Infectious_Complications_of_Body_Art__Infection_is. 7. aspx). Emergency Medicine News 24 (7): 10–3. doi:10.1097/01.EEM.0000334232.52899.06 (inactive 2010-06-14). .
External links • Histology at BU 08801loa (http://www.bu.edu/histology/p/08801loa.htm) - "Integument: scalp" • MeSH Sebaceous+Glands (http://www.nlm.nih.gov/cgi/mesh/2009/MB_cgi?mode=&term=Sebaceous+ Glands)
Article Sources and Contributors
Article Sources and Contributors Sebaceous gland Source: http://en.wikipedia.org/w/index.php?oldid=395368752 Contributors: 1st2Bomb, AED, Abdull, Aitias, Andycjp, AnnaP, Arcadian, Auntof6, AxelBoldt, Bansp, Bobo192, CerealBabyMilk, Ceyockey, Chris Capoccia, CommonsDelinker, CrazyInSane, Darklilac, Davewho2, DeadEyeArrow, Divide, Dougluce, Dprady, Dr. Doof, Dreamer.redeemer, Ds13, Edgar181, Evets21, Fences and windows, Fsotrain09, Fuzzbox, Fuzzy901, Geni, Hankwang, Helix84, Hightower 40, Intersofia, Iraqidude, Jchae88, Kajerm, Kjkolb, Lando242, Lichee66, Majorly, MarcoTolo, Mattygabe, Mctt, Mikael Häggström, Mikekearn, Moshe Constantine Hassan Al-Silverburg, My Core Competency is Competency, Neckoneckonecko, Neilbeach, Nuno Tavares, Oatmeal batman, Obli, OlEnglish, Pablo X, Peter Ellis, Ph.eyes, Pwjb, R sirahata, RDBrown, Rlfb, Rogermw, Rune X2, Saleen1996, Seanmiz, Smulthaup, SofiaSoGood, Sprostini, Steven Walling, Stratuspower88, TLazzo, Taco325i, That Guy, From That Show!, Tjmayerinsf, UnicornTapestry, Vojtech.dostal, Vsion, WLU, Waitak, Wikid77, Wikijens, Wolfkeeper, Writerite, X-Fi6, Yvwv, Zinnmann, 102 anonymous edits