Scanning electron microscopic study of the epithelial cells and the epithelium-connective tissue interface of the inferior surface of macaca fuscata tongue mucosa

The characteristics of the epithelial cells and the epithelium-connective tissue interface of the inferior surface of Macaca fuscata tongue mucosa were described employing a scanning electron microscope. The specimens were fixed in buffered modified Karnovsky solution and after that with or without treatment with NaOH, were postfixed in osmium tetroxide. They were dehydrated with acetone, critical point dried with Hitachi, HCP-2, covered with gold ions in a Polaron coating device and examined in a Hitachi S-800, scanning electron microscope. The inferior surface of Macaca fuscata tongue mucosa presents numerous microridges. These layers are constituted by polygonal epithelial cells, containing numerous microplicae. These are isolated or grouped, with circular, elongated or pointed shapes. In NaOH treated specimens we noted the existence of numerous connective tissue papillae of several forms and sizes. In the intermediate phase of corrosion, the deep layer of epithelial cells can be seen. Small foramina of ducts of salivary glands are found on the connective tissue surface, and they are surrounded by a circular disposition of collagen fibrils.

Three dimensional structure of the subepithelial connective tissue papillae of the armadillo dasypus novemcinctus tongue

Fueron estudiadas las características estructurales de las papilas filiformes y de las papilas conjuntivas de la mucosa lingual de tatú, dasypus novemcinctus, empleando el microscopio electrónico de barrido. La parte anterior de la lengua está cubierta por las papilas filiformes y fungiformes. El número de proyecciones papilares en cada papila filiforme, es variable, observándose de 2 a 6 proyecciones. Las piezas tratadas en solución de HCL mostraron las proyecciones papilares en forma de dedos. La superficie anterior de la papila conjuntiva es convexa. Algunas papilas mostraron las proyecciones conjuntivas en forma de mano y son ligeramente cóncavas en la cara posterior y convexas en la parte interior