A genital cord is a structure appearing in the development of the urinary and reproductive organs . However, there still are two kinds of genital cords The common genital cord is the most caudal portions of the M llerian duct and Wolffian duct , where they go side by side. The genital cords of the germinal epithelium are ingrows from the germinal epithelium disambiguation germinal epithelium disambiguation ... more details
Parietals may refer to A reptilian diagnostic term, see parietal scales Parietal cells , stomach epithelium cells that secrete gastric acid and intrinsic factor to aid in digestion. disambig ... more details
File Normal Epidermis and Dermis with Intradermal Nevus 10x.JPG thumb 350px right Skin epithelium purple with lamina propria lamina propria underlying connective tissue pink the epithelium exhibits rete pegs . Rete pegs are the epithelial extensions that project into the underlying connective tissue. In the epithelium of the mouth, the gingiva attached gingiva exhibit rete pegs, while the sulcular epithelium sulcular ref name Itoiz Itoiz, ME Carranza, FA The Gingiva. In Newman, MG Takei, HH Carranza, FA editors Carranza s Clinical Periodontology , 9th Edition. Philadelphia W.B. Saunders Company, 2002. pages 23. ref and junctional epithelium junctional epithelia do not. ref name P&S Page, RC Schroeder, HE. Pathogenesis of Inflammatory Periodontal Disease A Summary of Current Work. Lab Invest 1976 34 3 235 249 ref Downward thickening of the epidermis between the dermal papillae. References Reflist Category Periodontology Dentistry stub Med stub ... more details
No footnotes date December 2010 Image Cervical loop.png thumbnail The cervical loop area 1 dental follicle cells, 2 dental mesenchyme, 3 Odontoblasts, 4 Dentin, 5 stellate reticulum, 6 outer enamel epithelium, 7 inner enamel epithelium, 8 ameloblasts, 9 enamel. The cervical loop is the location on an enamel organ in a tooth development developing tooth where the outer enamel epithelium and the inner enamel epithelium join. The cervical loop is a histology histologic term indicating a specific epithelial structure at the apical side of the tooth germ, consisting of loosely aggregated stellate reticulum in the center surrounded by stratum intermedium . These tissues are enveloped by a basal layer of epithelium known on the outside of the tooth as outer enamel epithelium and on the inside as inner enamel epithelium . During root formation the inner layers of epithelium disappear and only the basal layers are left creating Hertwig s Epithelial Root Sheath HERS . At this point it is usually referred to as HERS instead of the cervical loop to indicate the structural difference. Cervical loop as epithelial stem cell niche It is thought that the central epithelial tissue of the cervical loop, the stellate reticulum , acts as a stem cell reservoir. In continuously growing teeth such as the rodent incisor the original structure of the cervical loop is maintained and no HERS forms. The stem cells provide the epithelial progeny to sustain the continuous growth. References Cate, A.R. Ten. Oral Histology development, structure, and function. 5th ed. 1998. ISBN 0 8151 2952 1. Ross, Michael H., Gordon I. Kaye, and Wojciech Pawlina. Histology a text and atlas. 4th edition. 2003. ISBN 0 683 30242 6. Harada, H., Kettunen, P., Jung, H. S., Mustonen, T., Wang, Y. A., and Thesleff, I. 1999 Localization of putative stem cells in dental epithelium and their association with Notch and FGF signaling. J. Cell. Biol. 147 105 120 Use dmy dates date December 2010 Category Tooth development denti ... more details
refimprove date January 2011 Infobox Anatomy Name PAGENAME Latin GraySubject GrayPage Image Illu epithelium.jpg Caption Squamous epithelium is one of several types of epithelia. Image2 Caption2 Precursor System Artery Vein Nerve Lymph MeshName MeshNumber Code TerminologiaHistologica 2 00 02.0.01027 In anatomy , squamous epithelium from Latin squama , scale is an epithelium characterised by its most superficial layer consisting of flat, scale like cell biology cells called squamous epithelial cells . Epithelium may be composed of one layer of these cells, in which case it is referred to as simple squamous epithelium , or it may possess multiple layers, referred to then as stratified squamous epithelium . Both types perform differing functions, ranging from nutrient exchange to protection. cn date January 2011 Cancers of the squamous epithelium include squamous cell carcinoma , basal cell carcinoma , and other adnexal tumors. cn date January 2011 Squamous epithelial cells have a polygonal appearance when viewed from above. ref cite book author K hnel, Wolfgang title Color atlas of cytology, histology, and microscopic anatomy publisher Thieme year 2003 isbn 9783135624044 page 102 url http books.google.com books?id wUFAGmVN aMC&pg PA76 ref See also Gastrulation References reflist External links KansasHistology epithel epith02 Simple squamous epithelium of the glomerulus kidney http www.lima.ohio state.edu academics biology images anatomy Simple 20Squamous 20Epithelium 20400X.jpg Diagrams of simple squamous epithelium KansasHistology epithel epith12 Stratified squamous epithelium of the vagina KansasHistology epithel epith14 Stratified squamous epithelium of the skin thin skin KansasHistology epithel epith15 Stratified squamous epithelium of the skin thick skin http bioweb.uwlax.edu zoolab Table of Contents Lab 1b Cross section of the esophagou Stratified squamous epithelium stratified squamous epithelium.htm Stratified squamous epithelium of the esophagus http www.ningi ... more details
Squama or Squamous refers to a structure shaped like the scale zoology scale of a fish . More specifically, it can refer to Squama frontalis Squama occipitalis Squama temporalis , the squamous portion of the temporal bone Squamous cell Squamous epithelium refers to epithelium, e.g. the skin, composed of squamous cells. See also Desquamation disambig cs upina de Schuppe la Squama sk upina ... more details
Periodontal membrane may refer to The periodontal ligament PDL , largely referred to as the periodontal membrane outside of the United States An artificial periodontal membrane , used to block the spread of growing epithelium after periodontal surgery. disambig ... more details
Infobox Embryology Name PAGENAME Latin GraySubject 241 GrayPage 1110 Image Caption Image2 Caption2 System CarnegieStage Days Precursor surface ectoderm GivesRiseTo lower anal canal MeshName MeshNumber DorlandsPre DorlandsSuf A proctodeum is the back germ layer ectodermal part of an alimentary canal . It is created during embryogenesis by a folding of the outer body wall. It will form the lower part of the anal canal , below the pectinate line , which will be lined by Stratified squamous epithelium stratified squamous non keratinized zona hemorrhagica and Stratified squamous epithelium stratified squamous keratinized zona cutanea epithelium. The junction between them is Hilton s white line . External links http trc.ucdavis.edu mjguinan apc100 modules Reproductive bird overview0 overview.html http www.embryology.ch francais sdigestive gesicht08.html developmental biology stub Development of digestive system Category Embryology of digestive system ... more details
Infobox Anatomy Name PAGENAME Latin GraySubject GrayPage Image Illu epithelium.png Caption Epithelium Image2 Caption2 Precursor System Artery Vein Nerve Lymph MeshName MeshNumber Code TerminologiaHistologica 2 00 02.0.01013 Cuboidal epithelia are epithelial cell biology cells having a cube like shape that is, their width is approximately equal to their height. They may exist in single layers simple cuboidal epithelium or multiple layers stratified cuboidal epithelium depending on their location and thus function in the body. anatomy stub Epithelial types Category Epithelial cells pt Epit lio c bico ... more details
Infobox Embryology Name Nasal placode Latin placoda nasalis, placoda olfactoria GraySubject GrayPage Image Caption Image2 Caption2 System CarnegieStage Days Precursor GivesRiseTo olfactory epithelium MeshName MeshNumber Code Terminologia Embryologica TE E5.3.0.0.0.0.8 The nasal placode or olfactory placode ref EmbryologyUNC hednk 027 ref gives rise to the olfactory epithelium of the human nose nose . The terms nasal sac or nasal pit are sometimes used to describe an intermediate structure arising between the placode and epithelium chronologically. See also olfactory pit placode References references External links http embryology.med.unsw.edu.au Notes week4 3.htm nose http www.ana.ed.ac.uk database humat notes embryo sensory nose.htm Gray s Development of respiratory system Embryology of head and neck Category Developmental biology Category Embryology Anatomy stub ... more details
mergeto Bronchiole date November 2009 The primary bronchioles arise from the tertiary bronchus tertiary bronchi . They are histologically distinct from the tertiary bronchi in that their walls do not have hyaline cartilage and they have Clara cell s in their epithelial lining. The epithelium starts as a simple columnar epithelium simple ciliated columnar epithelium and changes to simple cuboidal epithelium simple ciliated cuboidal epithelium as the primary bronchiole decreases in size. The diameter of the primary bronchioles is often said to be less than 1 mm, though this value can actually range from 5 mm to 0.3 mm. As stated, these bronchioles do not have hyaline cartilage to maintain their patency. Instead, they rely on elastic fiber s attached to the surrounding human lung lung tissue for support. The inner lining lamina propria of these bronchioles is thin with no glands present, and is surrounded by a layer of smooth muscle . As the primary bronchioles get smaller they divide into terminal bronchiole s. References Dudek, Ronald W. High Yield Histology , 3rd ed. 2004 . ISBN 0 7817 4763 5 Gartner, Leslie P. and James L. Hiatt. Color Atlas of Histology , 3rd ed. 2000 . ISBN 0 7817 3509 2 Gartner, Leslie P. and James L. Hiatt. Color Textbook of Histology 2001 . ISBN 0 7216 8806 3 Category Lung anatomy ... more details
In biology, columnar refers to the shape of epithelial cells that are taller than they are wide. ref http cellbio.utmb.edu microanatomy default.htm Microanatomy Web Atlas Bot generated title ref Form follows function in biology, and columnar morphorphology hints at the functions of the cell. Columnar cells are important in absorption and movement of mucus. The cells may or may not bear microvilli involved in maximizing the surface area for intestinal absorption or cilia involved in moving mucus and trapped material up the respiratory passages to be expectorated or swallowed . Columnar epithelium may be simple or Stratified columnar epithelium stratified . Simple columnar epithelium is most common and involves one layer of cells attached to a basement membrane . The nucleus is closer to the Basal anatomy basal aspect of the cell than the Apical anatomy apical aspect. Single stratification tends to indicate absorptive function. Stratified columnar epithelium is rare but can be found in salivary glands . It consists of a layer of columnar epithelium resting on top of at least one other layer of epithelial cells, which may have any shape columnar, cuboidal , or squamous . Stratification in cuboidal tissue has a secretory function. References references Category Epithelial cells Category Cell biology ... more details
Squamous metaplasia refers to benign cancer non cancerous changes in the epithelium epithelial linings of certain organ anatomy organ s within the body. These cells assume a more squamous morphology. Common sites for squamous metaplasia include the Urinary bladder bladder and cervix . Smokers often exhibit squamous metaplasia in the linings of their airways. These changes don t signify a specific disease, but rather usually represent the body s response to stress or irritation. Vitamin A deficiency can lead to squamous metaplasia. In regards to the cervix, squamous metaplasia can sometimes be found in the ectocervix , as it is composed of squamous epithelium , whereas the endocervix is composed of columnar epithelium ref name Robbins Kumar, Vinay Abbas, Abul K. Fausto, Nelson & Mitchell, Richard N. 2007 Robbins Basic Pathology 8th ed. . Saunders Elsevier. pp. 716 720 ISBN 978 1 4160 2973 1 ref . Squamous metaplasia in the cervix are susceptible to dysplasia precancerous changes , which is why a smear test can be performed to monitor changes. pathology stub Reflist Pathology Category Histopathology ... more details
Infobox Anatomy Name Oral mucosa Latin tunica mucosa oris GraySubject 242 GrayPage 1110 Image Caption Image2 Caption2 Precursor System Artery Vein Nerve Lymph MeshName MeshNumber DorlandsPre t 22 DorlandsSuf 12832012 The oral mucosa is the mucous membrane epithelium of the mouth . It can be divided into three categories. Masticatory mucosa , keratin para keratinized stratified squamous epithelium , found on the dorsum of the tongue , hard palate and attached gingiva . Lining mucosa , non keratinized stratified squamous epithelium , found almost everywhere else in the oral cavity. Buccal mucosa refers to the inside lining of the cheek s and is part of the lining mucosa. Specialized mucosa , specifically in the regions of the taste bud s on the dorsum of the tongue. See also Oral mucosa tissue engineering External links BUHistology 09601loa Digestive System Oral Cavity and Teeth lip, oral mucosa OklahomaHistology 95 04 Lip OklahomaHistology 95 07 Lip Mouth anatomy Category Dental anatomy de Mundschleimhaut pt Mucosa oral ... more details
Orphan date April 2012 Infobox Anatomy Name Mucous membrane of the soft palate Latin GraySubject 243 GrayPage 1141 Image Caption Image2 Caption2 System Precursor MeshName MeshNumber DorlandsPre DorlandsSuf The mucous membrane of the soft palate is thin, and covered with stratified squamous epithelium on both surfaces, excepting near the pharyngeal ostium of the auditory tube , where it is columnar and ciliated. According to Klein, the mucous membrane on the nasal surface of the soft palate in the fetus is covered throughout by columnar ciliated epithelium, which subsequently becomes squamous some anatomists state that it is covered with columnar ciliated epithelium, except at its free margin, throughout life. Beneath the mucous membrane on the oral surface of the soft palate is a considerable amount of adenoid tissue. The palatine glands form a continuous layer on its posterior surface and around the uvula . They are primarily mucous secreting glands, as opposed to serous or mixed secreting glands. Gray s Mouth anatomy Tissue layers Category Membrane biology anatomy stub ... more details
The lamina lucida is a component of the basement membrane which is found between the epithelium and underlying connective tissue eg. epidermis skin epidermis and dermis of the skin . It is a roughly 40 nanometre wide electron lucent zone between the plasma membrane of the basal cells and the electron dense lamina densa of the basement membrane. ref name Andrews James, William Berger, Timothy Elston, Dirk 2005 . Andrews Diseases of the Skin Clinical Dermatology 10th ed. . Saunders. Page 5. ISBN 0 7216 2921 0. ref Similarly, electron lucent and electron dense zones can be seen between enamel of teeth and the junctional epithelium. The electron lucent zone is adjacent to the cells of the junctional epithelium and might be considered a continuation of the lamina lucida as both are seen to harbour hemidesmosomes. However, unlike the lamina densa, the electron dense zone adjacent to enamel show no signs of hemidesmosomes. ref Lindhe s Clinical Periodontology and Implant Dentistry, 4th ed. ref Also see Basal lamina References reflist integumentary system Dermatology stub Category Skin anatomy ... more details
Refimprove date December 2009 Bile ducts and pancreas Intrahepatic bile ducts compose the outflow system of exocrine bile product from the liver . They can be divided into ref name MacSweenBurt2007 cite book author1 Roderick N. M. MacSween author2 Alastair D. Burt author3 Bernard Portmann coauthors Linda D. Ferrell title MacSween s pathology of the liver url http books.google.com books?id 08a3FiePGGQC&pg PA518 accessdate 27 June 2010 year 2007 publisher Elsevier Health Sciences isbn 9780443100123 pages 518 ref Hepatic duct Lobar ducts right and left hepatic ducts stratified columnar epithelium. Interlobar ducts between the main hepatic ducts and the interlobular ducts pseudostratified columnar epithelium. Interlobular bile ducts between the interlobar ducts and the lobules simple columnar epithelium. Intralobular bile ducts cholangioles or Canals of Hering simple cuboidal epithelium, then by hepatocytes Bile canaliculi two half canaliculi formed by the hepatocytes facing the perisinusoidal space Reflist Digestive glands Use dmy dates date February 2011 DEFAULTSORT Intrahepatic Bile Ducts Category Hepatology Digestive stub ... more details
Infobox Disease Name Glandular and epithelial neoplasm Image Caption DiseasesDB ICD10 ICD9 ICDO OMIM MedlinePlus eMedicineSubj eMedicineTopic MeshID D009375 Glandular and epithelial neoplasm is a grouping of tumors arising from the glands and epithelium. An example is adenoma . Epithelial neoplasms Category Glandular and epithelial neoplasia disease stub ... more details
A keratin pearl is a keratin keratinized structure found in regions where abnormal squamous cells form concentric layers. Also called an epithelial pearl, due to a location among squamous cells of the epithelium , this type of structure is sometimes seen with squamous cell carcinoma . External links http medical dictionary.thefreedictionary.com keratin pearl Category Medicine Category Biology ... more details
the tooth and the bone at the apical end of the tooth where the epithelium remains open. In amphibians ... of the epithelium. Once again a rather rigid connection between bone and tooth is formed at the apical end of the tooth where no epithelium is present. In crocodilians and mammals the HERS is a transient ... epithelium elements of the periodontal ligament can migrate and form a flexible connection between ... more details
of columnar epithelium containing mucus secreting glands. It may also give rise to post coital after sexual intercourse bleeding as fine blood vessels present within the columnar epithelium are easily ... 3 4mm of the epithelium. Observation and re examination is necessary for 3 months after labour ... more details
context date April 2010 The thin segment is a segment of the nephron , which consists of thin descending limb of loop of Henle thin ascending limb of loop of Henle Histology Loop of Henle thin segment cell redirect here The basement membrane of the thin limb in humans has very uniform nodular thickenings that form a network that surrounds the tubule and acts as a support structure that is homologous to the collenchyma in plants. Smith, RA et al Arch Pathol Lab Med Vol 108, May 1984 have designated these nodules Belliveau Bodies after Robert Belliveau the pathologist who originally described these structures. The epithelium is Simple squamous epithelium . ref https histo.life.illinois.edu histo lab kidney kidney.htm University of Illinois College of Medicine ref References references genitourinary stub Category Kidney anatomy ... more details
Infobox Anatomy Name Nasal vestibule Latin vestibulum nasi GraySubject 223 GrayPage 994 Image Gray994.png Caption Sagittal section of nose mouth, pharynx, and larynx. Image2 Gray855.png Caption2 Lateral wall of nasal cavity. System MeshName MeshNumber DorlandsPre DorlandsSuf Nasal Vestibule is the most anterior part of the nasal cavity . It is enclosed by the cartilage s of nose and lined by the same epithelium of the skin Stratified squamous, keratinized . The other part of the nasal cavity, which is lined by the respiratory epithelium , is called nasal cavity proper . Inside the vestibule are small hairs called vibrissae , which filter dust and other matter that you breathe in. Nose anatomy Category Nose musculoskeletal stub respiratory stub ar ... more details
Image Gastric adenocarcinoma.jpg 200px right thumb Intestinal metaplasia top middle of image of the gastric antrum and stomach cancer adenocarcinoma of the stomach left centre of image . H&E stain . Intestinal metaplasia is the transformation metaplasia of epithelium , usually of the stomach , to a type that bears some resemblance to the intestine . Initially, the transformed eptithelium bears resemblance to the small intestine in the later stages, the epithelium resembles the Colon anatomy colon . It is characterized by the appearance of goblet cells . It is considered to be a risk factor for the development of adenocarcinoma . External links http www.mondofacto.com facts dictionary?intestinal 20metaplasia Intestinal metaplasia definition mondofacto.com. Category GI tract disorders Category Types of cancer ko ja ... more details
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