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1.
Braz. j. morphol. sci ; 21(1): 25-29, Jan.-Mar. 2004. ilus
Article in English | LILACS | ID: lil-658762

ABSTRACT

The structural organization of the anterior third of adult rabbit tongue was studied using light microscopy andconventional and high resolution scanning electron microscopy. Histologically, the muscle layer of the tongue consistedof muscle fibers arranged vertically, transversally and longitudinally. These fibers were surrounded by connectivetissue containing bundles of collagen fibers that formed the endomysium and the perimysium. Capillary blood vesselswere noted in the connective tissue between muscle fibers. Silver impregnation demonstrated the presence of numerousbundles of nerve fibers distributed irregularly around the muscle fibers. High-resolution scanning electron microscopyshowed that the sarcoplasm of the muscle cells consisted of bundles of myofilaments arranged longitudinally andnumerous mitochondria.


Subject(s)
Animals , Male , Female , Rabbits , Tongue/anatomy & histology , Muscle Fibers, Skeletal , Musculoskeletal Physiological Phenomena , Muscles/metabolism , Diagnostic Imaging , Microscopy, Electron, Scanning
2.
Pesqui. odontol. bras ; 16(1): 12-17, jan.-mar. 2002. ilus, tab
Article in Portuguese | LILACS, BBO | ID: lil-308362

ABSTRACT

Foram estudadas as medidas do diâmetro e quantidade dos túbulos dentinários presentes na coroa de incisivos decíduos humanos näo-irrompidos. Ao microscópio eletrônico de varredura, avaliaram-se tais parâmetros em amostras fraturadas longitudinal e transversalmente em nitrogênio líquido. O diâmetro dos túbulos dentinários variou de 0,50 a 1,94 micrômetros, sendo crescente da regiäo externa para a interna, e as diferenças foram estatisticamente significantes. Entretanto, näo houve diferença estatística quando comparados os terços incisal, médio e cervical. A quantidade de túbulos por milímetro quadrado variou de 3.281 a 32.313, e o número aumentou da regiäo dentinária externa para a mais interna


Subject(s)
Dentin , Pediatric Dentistry , Tooth, Deciduous , Incisor
3.
Braz. j. vet. res. anim. sci ; 39(5): 223-226, 2002. ilus
Article in English | LILACS | ID: lil-337559

ABSTRACT

The sensory nerve endings of the rat cheek mucosa were studied using the transmission electron microscopy. The specimens were fixed in modified Karnovsky solution and embedded in Epon resin. The sensory nerve endings showed a central terminal axon containing numerous mitochondria, neurofilaments, microtubules and clear vesicles. The proximal part of corpuscle revealed the cytoplasmic extensions of lamellar cells and the perineural cells. The fine bundles of collagen fibers are identified in the interlamellar spaces and the external part of corpuscle. Numerous concentric lamellae showed caveolae, interlamelar spaces filled with amorphous material, desmosome-type junctions between adjacent lamellae and the inner lamellar cells and the axoplasmic membrane. These fine structures are important to recognise and understand the morphological characteristics in the oral mucosa


Subject(s)
Microscopy, Electron , Mouth Mucosa , Rats , Sensory Receptor Cells
4.
Braz. dent. j ; 12(3): 163-166, set.-dez. 2001. ilus, CD-ROM
Article in English | LILACS, BBO | ID: biblio-872582

ABSTRACT

A angioarquitetura da gengiva palatina de coelhos jovens foi estudada utilizando-se o método de modelos de corrosão vascular. Os modelos de corrosão foram obtidos a partir da injeção de resina de baixa viscosidade (Mercox« Cl-2B) sendo, posteriormente observados ao microscópio eletrônico de varredura (MEV). A gengiva palatina apresentou áreas de diferentes disposições vasculares. Os capilares da gengiva palatina e da papila interdental emitiam diversas projeções, não detectadas, porém, no sulco gengival, onde a rede capilar mostrava-se de arranjo irregular, aplainado. Os vasos sangüíneos, nutrindo o osso alveolar, também foram observados


Subject(s)
Animals , Male , Female , Rabbits , Gingiva , Mouth Mucosa , Alveolar Process , Corrosion Casting , Gingiva , Microcirculation/ultrastructure , Microscopy, Electron, Scanning , Mouth Mucosa , Palate
5.
Rev. chil. anat ; 18(2): 227-30, 2000. ilus
Article in English | LILACS | ID: lil-282211

ABSTRACT

Pocos trabajos han relatado la angioarquitectura de animales jóvenes. Este estudio contribuye con las investigaciones acerca de la distribución tridimensional de la mucosa palatina en conejos jóvenes usando MEB. La corrosión vascular del molde fue obtenida usando resina de baja densidad-Mercox© CL-2B. No pudimos observar redes específicas en la cúpula de los pliegues palatinos, en los interpliegues y mucosa labial. Fueron observados solamente loops capilares y pliegues transversos palatinos


Subject(s)
Animals , Rabbits , Female , Male , Mouth Mucosa/anatomy & histology , Rabbits/anatomy & histology , Microscopy, Electron, Scanning , Corrosion Casting , Palate, Soft/anatomy & histology
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