RESUMO
the esophagus, stomach and intestine of Satanoperca pappaterra using histological techniques. The species presents detritivore-invertivore feeding habit and is widely distributed in Neotropical continental waters. The esophagus is short, the stomach is small with saccular form and the intestine is long. The histological sections were stained using hematoxylin/eosin and Periodic Acid Schiff. Throughout the digestive tract, the gastric wall is composed by four different tunicae: mucosa, submucosa, muscularis externa and serosa, besides distinct intrinsic innervation represented by the submucosal and myenteric ganglionated plexuses. Depending on the organ, several characteristics were peculiar such as the external muscle layer of the esophagus that permeates the submucosa; a single sphincter between the stomach and intestine; stomach without differentiated regions; intestine histologically and physiologically divided into two regions (proximal and distal), considering the villi height and spacing besides the density of the goblet cells.
RESUMO
The objective of this work was to study the effect of the aerobic physical training and the cafeteria diet introduced after weaning of Wistar rats and on the morphology of the main salivary glands (parotid, submandibular, sublingual). Male rats after weaning were subjected to the cafeteria diet or the standard rodent chow, and either performed aerobic physical training in a treadmill for 100 days, or did not performed any physical activity. Analyses were done considering the response in body weight, adipose tissues and salivary glands, and the data were submitted to statistical treatment (p 0.05). The morphological and morphometric analyses of the salivary glands were performed through histological sections stained with hematoxylin and eosin. Despite the normophagic behavior, the rodents fed with the cafeteria diet became obese, with repercussions on parotid gland weight. However, this obesity and/or physical training did not influence the histological organization of the salivary glands. The morphometric analysis of the submandibular glands pointed out a reduction in the levels of serous acinar cells as an effect of the diet and physical training. In conclusion, the parotid and the submandibular glands alter themselves due to the nature and consistency of food present in the cafeteria diet as well as due to the aerobic physical training.
RESUMO
In the renal and femoral arteries of rabbit was verified that both vessels had walls structured by myostromal components, despite of their different distributive of blood, being the renal artery a visceral blood vessel and the femoral artery a parietal vessel. This wall pattern in these vessels concerned to presence of connective stromal elements (collagen and elastic fibres and lamellae) and smooth muscle cells coexisting with some equilibrium in the wall structure of the renal and femoral arteries, mainly in the medial layer architecture. An intimal folding pattern was verified around the vascular lumen, possibly related to capacitance of the both arteries regarding to variability of pressure levels in cardiac cycle. Furthermore, myostromal relations of connective elements and smooth muscle cells verified in the medial layer and the network formed by connective elements in the adventitial layer of these arteries contributed to maintenance of wall viscoelasticity properties of the vessels
Nas artérias renais e femorais de coelho, foi verificado que ambos os vasos tinham paredes estruturadas por componentes mioestromais (fibromusculares), apesar de a distribuição de sangue ser diferente, sendo a artéria renal um vaso sangüíneo visceral e a artéria femoral um vaso parietal. Esse padrão estrutural diz respeito à presença de elementos estromais conectivos (colágeno, fibras e lamelas elásticas) e de células musculares lisas coexistindo em equilíbrio na parede das artérias renal e femoral, principalmente na arquitetura da camada média. Na íntima um padrão ondulado foi verificado ao redor do lúmen vascular, possivelmente relacionado à capacidade de ambas as artérias terem uma variabilidade nos níveis de pressão durante o ciclo cardíaco. Além disso, relações de elementos conjuntivos e células musculares lisas verificadas na túnica média e a rede formada através de elementos conectivos na camada adventícia dessas artérias contribuem para a manutenção das propriedades de viscoelasticidade das paredes dos vasos