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Fine structure of the retinal pigment epithelium of the barred owl (Strix varia)

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dc.contributor.authorBraekevelt, Charlie, R.
dc.contributor.authorSmith, S. A.
dc.contributor.authorSmith, B. J.
dc.date.accessioned2020-07-02T15:13:25Z
dc.date.available2020-07-02T15:13:25Z
dc.date.issued1996
dc.description.abstractThe retinal pigment epithelium (RPE) as well as the choriocapillaris and Bruch's membrane (complexus basalis) have been studied by light and electron microscopy in the barred owl (Strix varia). The RPE consists of a single layer of cuboidal cells joined laterally by a series of tight junctions that forms part of the blood-ocular barrier. Basally (sclerally) the retinal epithelial cells display numerous deep infoldings while apically (vitreally) microvillar processes interdigitate with the photoreceptor outer segments. Internally the RPE cells show a large vesicular nucleus, plentiful smooth endoplasmic reticulum (SER) and polysomes but very little rough endoplasmic reticulum (RER). Numerous pleomorphic (including ring-shaped) mitochondria are basally located. In the light-adapted state the small melanosomes are almost exclusively located within the apical process indicating that retinomotor movements probably occur. Phagosomes and lysosome-like bodies are present as are myeloid bodies which may show ribosomes on their outer surface. Bruch's membrane is typical of avian species in that it is pentalaminate and the central lamina densa is displaced towards the choroid. The choriocapillaris endothelium is thin but only minimally fenestrated facing Bruch's membrane. Most fenestrations present show a single-layered diaphragm while others display a double-layered diaphragm as noted in other avian species.es
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dc.format.extent7es
dc.identifier.citationHistology and Histopathology, Vol. 11, n.º 1 (1996)
dc.identifier.issn1699-5848
dc.identifier.issn0213-3911
dc.identifier.urihttp://hdl.handle.net/10201/94381
dc.languageenges
dc.publisherF. Hernández y Juan F. Madrid. Universidad de Murcia: Departamento de Biología Celular e Histologíaes
dc.rightsinfo:eu-repo/semantics/openAccesses
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectRetinal pigment epithelium (RPE)es
dc.subjectFine struturees
dc.subjectAveses
dc.subjectBarred owles
dc.subjectStrix variaes
dc.subject.otherCDU::5 - Ciencias puras y naturales::57 - Biología::576 - Biología celular y subcelular. Citologíaes
dc.titleFine structure of the retinal pigment epithelium of the barred owl (Strix varia)es
dc.typeinfo:eu-repo/semantics/articlees
dspace.entity.typePublicationes
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Histology and histopathology Vol.11, nº 1 (1996)