RESUMO
The three-dimensional architecture of the vascular network of the nasal septum of the gerbil rat was studied using the corrosive resin cast technique. The angioarchitecture of the nasal septum observed with scanning electron microscopy (SEM) showed that a vascular network is disposed in the lamina propria. The capillaries, arterioles, venules and arteries were closely observed in different areas of the nasal septum mucosa.
Assuntos
Capilares/ultraestrutura , Gerbillinae/anatomia & histologia , Microcirculação/ultraestrutura , Mucosa Nasal/irrigação sanguínea , Septo Nasal/irrigação sanguínea , Animais , Artérias/ultraestrutura , Arteríolas/ultraestrutura , Molde por Corrosão , Feminino , Masculino , Microscopia Eletrônica de Varredura , Vênulas/ultraestruturaRESUMO
The authors examined the filiform and fungiform papillae surfaces of rat tongue by scanning electron microscopy showing the numerous groupings of bacteria on the epithelial cell membranes. The fungiform papillae were round in shape and present few bacteria. The epithelial cell of filiform papillae revealed numerous streptococci. The grouping of the bacteria are attached on the epithelial cell membrane, demonstrating three-dimensional SEM images.
Assuntos
Células Epiteliais/microbiologia , Papilas Gustativas/microbiologia , Língua/citologia , Animais , Células Epiteliais/ultraestrutura , Microscopia Eletrônica de Varredura , Mucosa Bucal/citologia , Mucosa Bucal/microbiologia , Ratos , Ratos Wistar , Streptococcus/ultraestrutura , Papilas Gustativas/ultraestruturaRESUMO
The three-dimensional architecture of the vascular network of the rat's lingual papillae has been studied employing the corrosive resin cast technique. The casts of the microvasculature of these types of papillae (the small conical filiform, true filiform, fungiform and vallate papillae) have been observed under scanning electron microscopy (SEM). The microvascular arrangements of the filiform papillae consist of well-defined simple or twisted capillary loops. The fungiform papillae have a cylindrical form with a central hole, and the capillary network gives shape to the whole papilla. Finally, the capillary bed of the oval-shaped vallate papilla with its characteristic network and small hairpin-like loops was also examined.
Assuntos
Capilares/ultraestrutura , Ratos Wistar/anatomia & histologia , Língua/irrigação sanguínea , Animais , Feminino , Masculino , Microcirculação/ultraestrutura , Microscopia Eletrônica de Varredura , Modelos Estruturais , Ratos , Língua/ultraestruturaRESUMO
At its extrapelvic course the inferior gluteal a. is found to be strictly related to the sciatic n. This relationship has been described in a general way, emphasizing its medial localization in respect to the nerve. Clinicosurgical reports describe cases of aneurysms of the inferior gluteal a. on its extrapelvic course and subsequent compression at the nerve. In order to get further details on the relationship between these two structures, 80 gluteal regions from 40 cadavers of adult Brazilian individuals, 29 males and 11 females, were dissected. The inferior gluteal a. was found medial to the sciatic n. in 62 cases (77.5%); in the 18 remaining (22.5%) the trunk of the artery or one of its branches perforated the nerve. Of these, 14 (77.8%) were males and 4 (22.2%) females. This disposition was found 8 times (44.4%) on the right and 10 (55.6%) on the left side; was unilateral in 4 individuals (1 on the right and 3 on the left side) and bilateral in 7. The course of the inferior gluteal a. through the sciatic n. and/or the presence of aneurysms of this artery should be considered as a possible cause of nerve compression.