EPIDIDIMO HISTOLOGIA PDF

Mezitaur The B cells are characterized by presence of nuclei of different shapes. Maturation of spermatozoa in the rabbit. Morphology of the bovine epididymis. Histochemical localization of carbonic anhydrase in the testis and epididymis of the boar. The A cells had a slender shape, and are characterized by a wide cytoplasmic apical part, a narrow body and a more apically located nucleus, comparatively to P cells morphology. Histologia aparato reprodutor epididimo The epididymis of epidiximo dog, based on morphological differences, reveals five distinct and continuous zone in the duct.

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Mezitaur The B cells are characterized by presence of nuclei of different shapes. Maturation of spermatozoa in the rabbit. Morphology of the bovine epididymis. Histochemical localization of carbonic anhydrase in the testis and epididymis of the boar. The A cells had a slender shape, and are characterized by a wide cytoplasmic apical part, a narrow body and a more apically located nucleus, comparatively to P cells morphology. Histologia aparato reprodutor epididimo The epididymis of epidiximo dog, based on morphological differences, reveals five distinct and continuous zone in the duct.

Each zone can be readly distinguished on the basis of its own duct morphological characteristics. This zone was characterized by irregular epithelium Histology and histochemistry of corpus epididymis in indian buffaloes Bubalus bubalis at different ages of maturity. Functional relationship of the mammalian testis and epididymis. Studies of the guinea pig epididymis. The luminal diameter is Some aspects of structure and function in the mammalian epididymis. The epithelium decreases in height and, concomitantly there is an increase in luminal diameter and in muscle wall thickness.

Epididdimo, the purpose of this study is to describe morphologically the regional histology of the ductus histplogia in the dog, to provide a detailed structural baseline for specific studies of functional zonation in the epididymis of the dog, or, to comparate to other mammals.

Ultrastructure and quantitative morphology of the principal cells. Thus, the zone V was characterized by lower epithelium, greater luminal diameter, greater sperm concentration, denser and shorter stereocilia, and a thicker smooth-muscle wall, comparatively to other epididymal zones. A cells, with round to ovoid nuclei, are scarcely found, and B cells are similar to those of preceeding zones.

HAMILTON reported that epididymis is a dynamic structure of the seminal pathway, and its complex morphophysiology does not agree with the concept that epididymis would have merely a passive influence on sperm physiology. Ultrastructural observations suggesting merocrine secretion in the initial segment of the mammalian epididymis.

In contrast to those findings, in our present study, it has been found A epiddimo in all the histological zones of the dog epididymidis, although in the zone V distal tailthey are not so striking, owing to the lower epithelial height.

From the average values for each animal and its distinct epididymal zones, arithmetic means and s. Note the stereocilia s and myoepithelial cells arrowheads. Some features distinguished the epithelial lining of zone III. Casilla D Temuco mdelsol ufro.

Along the five regions in dog epididymidis, are found columnar cells and basal cells. It is observed zone I or initial segment and zone II, both of them localized into the head. However, each epididymal region shows differentiating features with respect to epithelial height, luminal diameter, thickness of muscular wall, and cytological characteristics of epithelial cells. The epithelial lining measures The fourth and fifth zones zones IV and Vare restricted to the epididymal tail, localized into the proximal and distal Cauda epididymidis, respectively.

New York, Raven Press, The zone V comprises the distal tail, and is characterized by lower epithelial lining, greater luminal diameter, shorter stereocilia, packed spermatozoa inside the tubular lumen, and a thicker smooth muscle wall, comparatively to the other histological zones in the dog epididymidis. Previously, ORSI et al. Regional histology and fine structure of the epididymal duct in the golden epidkdimo Mesocricetus auratus. The last region Vis continuous to the vas deferens Fig.

The stereocilia hitsologia are regular and shorter, forming a brush border. Two different types of columnar cells could be distinguished: Thus, the middle segment of the dog epididymidis, or zone III, comprises the distal head and all the body. The epididymis, in all the species studied, so far is known, present variabilities in structure and function along its length. The luminal occurrence of many epividimo of spermatozoa is a typical feature of this zone.

The epithelial lining of all histological zones in the dog epididymidis contains, mainly, three cell types: The fourth and fifth zones zones IV and Vare restricted to the tail, localized into the proximal and distal Cauda epididymidis, respectively.

On the regional histology and cytochemistry of the epididymis in the rabbits. The basal B cells lie next to the basal lamina, and do not reach the tubular lumen. Fully exposed epididymis of the dog. A cells are scarce and presented the same morphology, as described later. A light microscope and ultrastructural study. P cells were the major cell type, and possessed slightly shorter; irregular stereocilia, with ovoid and elongated nuclei located at the middle part of the cells.

Based upon morphological features such as: Ten adult, mongrel, sexually mature dogs Canis familiarisL. Structure and function of the ductuli efferentes, ductus epididymidis and vas deferens in mammals.

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Sagar Thus, the purpose of this study is to describe morphologically epididijo regional histology of the ductus epididymidis in the dog, to provide a detailed structural baseline for specific studies of functional zonation in the epididymis of the dog, or, to comparate to other mammals. Also, it should be noted that transition between the zones is gradual, not abrupt. A cells, with round to ovoid nuclei, are scarcely found, and B cells are similar to those of preceeding zones. The epithelial lining measures Stellate lumen stars of the ductal sections in the zone III. The few B cells found, contained an elongated nucleus parallel to the basal lamina. Several histological features differentiate the zone V from the other epididymal zones, in the dog.

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