共查询到20条相似文献，搜索用时 31 毫秒
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The finer innervation of the tissues of the lung was studied with several methods of silver impregnation, focussing especially on the fibers and endings of the nerves. The richest terminal innervation could be found in the epithelial and subepithelial tissue, and was sometimes similar to the situation in the smooth muscles which might indicate that, somehow, secretory and motor innervation are alike morphologically. On the other hand, there were many nerve fibers in the perichondrium of the small nodules and plaques of cartilage too, although they did not enter the cartilaginous tissue. The final nerves ended in different forms, from round or ovoid masses to free "ultraterminal" filaments. 相似文献
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A. Arencibia J. M. Vázquez J. A. Ramirez-Gonzalez F. Moreno F. Gil R. Latorre G. Ramirez-Zarzosa J. A. Sandoval y C. Sosa-Perez 《Anatomia, histologia, embryologia》1997,26(3):165-172
A radiologic and tomographic study was made of the cranioencephalic topography of canary goats of medium weight and size. In a first step, the exocranialis references corresponding to an axis designed at the level of the meatus acusticus externus and parallel to the basicranial axis were anatomically and radiologically defined. Conventional stereotaxic techniques were then used to reach the standard position of the head in order to obtain macroscopical cross sections at different levels perpendicular to the base of the cranium. In a second step, a tomographic study was made to confirm the design of the axis. 相似文献
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O. Gonzalez Sequeros J. E. Guijarro de Pablos J. R. Moral Rubio J. A. Ramirez Gonzalez 《Anatomia, histologia, embryologia》1989,18(3):205-226
A study of the crista ampullaris of the vestibular apparatus was carried out in chicken embryos. The study group included embryos between stages 24 and 39 of Hamburger-Hamilton. This study elucidates the relationship of the cupula with respect to the epithelium of the crista ampullaris. With electron microscopic examination, the rough endoplasmic reticulum of the crista epithelial sustentacular cells at developmental stage of 31 H-H, demonstrated dilatations containing secretory material. Vesicles, with adhering ribosomes appear to be formed from these dilatations. At later stages of development, the vesicular material took on the characteristics of the fibrillary material composing the cupula. In some cells, secretory vesicles are seen near the apical border of these cells, where they apparently secrete vesicular contents into the endolymphatic space, contributing to the formation of the cupula. 相似文献
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Contribution to the study of the neuroardiitecture of the periodontal ligament and its functional significance In the present study particularly the specific receptors for certain sensory stimuli such as for pain, touch and pressure were studied. The vascular system is accompanied in its entirety by myelinated and nonmyelinated nerve fibers which form a kind of satellite system to the vessels. 相似文献
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M. A. Montenegro M. A. Rojas D. Lemus E. González M. J. Blánquez 《Anatomia, histologia, embryologia》1989,18(4):297-304
In this study we examined some histologic and histochemical characteristics of the embryonic sheep dental epithelium in early odontogenesis. During the first trimester of development, a short-lived dental lamina was observed. Apparently in the sheep, the interactions between epithelial and ectomesenchymal cells required for tooth normal morphogenesis are altered. 相似文献
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R. C. Puerta J. G. Monterde A. Diz J. M. Carmona 《Anatomia, histologia, embryologia》1993,22(2):179-182
Radiographic projection of a median section of the brain and skull in goat This study, based on three goats, provides a radiographic projection of a median section of the brain and the skull. The method allows a topographic correlation of brain structures with the skull and surrounding osseous structures. A standard skull position, with the basic horizontal plane passing through the external acoustic meatus, and parallel to the floor of the skull, results in a method of localizing brain structures in specific transverse planes. This stereotaxic method allows investigators to account for variability in topography between animals in the localization of brain structures through external morphology. 相似文献
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J. A. Sandoval F. Gil A. Arencibia I. Ayala y J. Ma. Vazquez 《Anatomia, histologia, embryologia》1995,24(4):269-274
Histochemical and morphometric study of fibrilar population in diaphragm muscle. Part I: Horse and Dog By using m-ATPase techniques, under alkaline and acid pre-incubations, as well as metabolic techniques (α-MGPDH and NADH-TR), sections from the lumbar and costal portions of diaphragm muscle in horse and dog were analysed. Fibre samples were exposed to image-analysis observations in order to determine the lowest fibre diameter and obtain estadistical data. The findings revealed that the lumbar portion of horse diaphragm consists of fibre types I, IIA and IIB; in the costal portion, the fibre types I and IIA were present. In the dog, the lumbar and costal portions consisted of fibre types I, IIA and IIC, which showed some specific histochemical characteristics. Some data concerning both morphometrical and statistical fibre-type analysis are presented. 相似文献
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J. A. Sandoval A. Arencibia G. Ramirez y A. Montes 《Anatomia, histologia, embryologia》1995,24(4):275-280
Histochemical and Morphometric Study of the Fibrilar Population in Diaphragm Muscle. Part II: Ox and Pig M-ATPase techniques, at different pH levels prior to incubation, as well as metabolic procedures (α-MGPDH and NADH-TR), were used to determine the fibre-type content of the lumbar and costal portions in the bovine and porcine diaphragm. The fibre samples were exposed to image analysis in order to evaluate both the morphometrical and statistical values. On the basis of tintorial reactions, the fibre types IA, IB and IIC were found in the lumbar portion of the bovine diaphragm; in the costal portion of the same diaphragm, IA, IB, IIA and IIC fibre types were observed. With regard to the porcine diaphragm, the I, IIA, IIB, IIC fibre types were present in both portions of the muscle. Further morphometrical and statistical data concerning all the fibre types are obtained and discussed. 相似文献
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Entérite nécrotique chez le pollet de gril III. Etude des facteurs favorisant la multiplication de Clostridium perfringens et la transmission expérimentale de la maladie 
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下载免费PDF全文 Necrotic enteritis was reproduced experimentally in two week old broiler chickens by intravenous injection and also by oral administration of a pure culture of Clostridium perfringens. In the first experiment, gross and microscopic intestinal lesions, typical of necrotic enteritis, were observed in all diseased birds and mortality was obtained only in the group of birds that were injected with 0.4 ml or more of the pure culture of the microorganism. In the second experiment, the highest mortality was noted in the group of birds that received orally, in addition to the Clostridium culture, a solution of sodium bicarbonate, to obtain an alkaline intestinal content and opium to decrease the intestinal peristaltism. The gross and microscopie intestinal lesions of the diseased and killed birds were more severe than those observed in the other groups and were similar to those encountered in field outbreaks of necrotic enteritis. 相似文献
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This study describes the left and right coronary artery distribution in the Spanish fighting bull, and compares the findings of the investigation with those of other bovine species in which similar investigations have been carried out. It is concluded that the general distribution of the coronary system in the Spanish fighting bull is similar to that of other bovine species which have been studied. 相似文献
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In the literature reviewed, there are certain differences of opinion with regard tostructural details of the wall of the internal carotid artery in the cervical and petrosalportion. Therefore, histological material of human necropsies was processed in order toobtain 10pm. paraffin sections of the artery and surrounding tissues which were stainedwith orcein, resordn-fuchsine, Verhoeff and picrofuchsine. While in the cervical segment of theartery there is a neat predominance of muscle fibres over elastic ones in the media, the elasticelements can be found especially in the inner layers of the adventitia, and there exist aclearly defined elastica interna and externa. Therefore the authors consider this part ofthe artery as of the transitional type. On the other hand, the petrosal portion must be consideredas of the muscular type, with abundant muscle fibres in the media and a wellformed and even double elastica interna, while the externa is scarcely visible. In bothsegments, the artery is very well fixed with the surrounding connective sheath. 相似文献