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Angelika Brandt Bertram Schnorr Dietrich Weyrauch 《Anatomia, histologia, embryologia》1983,12(1):7-24
The ultrastructure of the adipose tissue connective tissue, mesothelium and milky spots forming the greater cmentum of sheep and goats was studied.
The mixture of connective tissue fibers and adipose tissue is arranged in submesothelial, marginal, and central layers. – The mesothelial cells are covered by a surface coat and are characterized by numerous microvilli and vesicles. The number of milky spots varies greatly. They are commonly found on the surface of the omentum and are covered by modified mesothelial cells; their interior contains macrophages and lymphoid cells. 相似文献
The mixture of connective tissue fibers and adipose tissue is arranged in submesothelial, marginal, and central layers. – The mesothelial cells are covered by a surface coat and are characterized by numerous microvilli and vesicles. The number of milky spots varies greatly. They are commonly found on the surface of the omentum and are covered by modified mesothelial cells; their interior contains macrophages and lymphoid cells. 相似文献
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The purpose of this scanning electronmicroscopical study was to describe the structure of the lamina propria of the ruminal mucosa in calves on different diets.
The surface epithelium was removed with 0.3 % acetic acid. The exposed lamina propria showed structural differences, both macroscopically and microscopically in the different dietary groups. At the submicroscopic level, however, no differences were observed. 相似文献
The surface epithelium was removed with 0.3 % acetic acid. The exposed lamina propria showed structural differences, both macroscopically and microscopically in the different dietary groups. At the submicroscopic level, however, no differences were observed. 相似文献
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Scharek L Guth J Reiter K Weyrauch KD Taras D Schwerk P Schierack P Schmidt MF Wieler LH Tedin K 《Veterinary immunology and immunopathology》2005,105(1-2):151-161
The influence of the probiotic bacterium Enterococcus faecium SF68 on the immune system and the intestinal colonization of pigs were determined in a feeding experiment with sows and piglets. Mucosal immunity of the developing piglets was monitored by isolation and detection of intestinal lymphocyte cell populations from the proximal jejunal epithelium and the continuous Peyers patches by the use of flow cytometry. The levels of intestinal IgA in both groups of piglets were compared, as well as total IgG in the serum of sows and piglets. Feces of the sows and intestinal contents of the piglets were taken for determination of total anaerobe and coliform bacterial counts in both probiotic and control groups. Villus length and depth of the crypts were measured in the jejunum of sacrificed piglets to monitor the development of the intestinal mucosal surface amplification. Total serum IgG of the sows appeared to be unaffected. Piglets of both groups showed similar IgG levels up to 5 weeks after birth with a slight tendency toward lower values in the probiotic group. At an age of 8 weeks the total IgG levels of the probiotic animals were significantly lower (p<0.01). No differences were observed in the populations of CD4+ and CD8+ T cells in the Peyers patches. However, the levels of cytotoxic T cells (CD8+) in the jejunal epithelium of piglets of the probiotic group were significantly reduced. The depth of the jejunal crypts and length of the villi were similar in both groups, suggesting the relative T-cell population differences were not due to alterations in the epithelial cell numbers. The total anaerobe and coliform bacterial populations were not significantly affected by the probiotic treatment, either in sows or in the piglets. However, a remarkable decline in the frequency of beta-haemolytic and O141 serovars of Escherichia coli was observed in the intestinal contents of probiotic piglets, suggesting an explanation for the reduction in cytotoxic T-cell populations. 相似文献
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The intestinal morphology of 7-week-old pigs was investigated by light (LM) and scanning electron microscopy (SEM). The piglets were fed either a semisynthetic or a cereal-based diet. The shapes of the intestinal villi and crypts of the duodenum, jejunum and ileum were examined. The villi were predominantly tongue-shaped. In the duodenum they were also ridged, branched and folded, and in the jejunum they were also leaf-like and ridged. At places with lymph follicles, the surface of the ileum was rugged with meandering fold-like villi. The crypts of the three segments of the small intestine were mainly coiled and sometimes branched. A novel morphometric evaluation method was introduced using the enlargement factors of each villus and crypt surface. The enlargement factor for the villus surface of the duodenum, jejunum and ileum was 3.13, 3.72 and 2.71, respectively. The factor for the crypt surface of the duodenum, jejunum and ileum was 9.07, 8.94 and 6.53, respectively. Furthermore, the relative proliferation rate and the epithelial renewal index were calculated for the first time. The relative proliferation rate of the duodenum, jejunum and ileum was 32.88, 34.78 and 50.77 proliferations per mm crypt perimeter, respectively. The diets consumed had an influence on the epithelial renewal index being higher for piglets fed the cereal-based diets. 相似文献
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The purpose of this paper is to demonstrate the stereoscopic structure of the papillary body of the proventricular mucous membrane in the sheep and the goat. This papillary body hitherto has only been known from histological sections. — Tissue specimen were taken from freshly killed animals and put into 0.3% acetic acid, in order to let the epithelium peal off. The investigation was carried out with the scanning electronmicroscope. At places where the mucous membrane has a smooth surface, the papillary body consists of slender papillae and in the other proventricular portions it consists of cone-, crest- or comblike propria elevations. 相似文献
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