La histología regional del conducto del epidídimo en el perro comprende cinco regiones histológicamente distintas y continuas. Dos de las. Test Histologia aparato reprodutor epididimoenEpididimo Cual epitelio presenta el Epididimo?. Cuales fibras que rodean?. Cual epitélio. Histology and testicular and epididimal ultraestructure in Anolis sagrei (Sauria: Polychrotidae)/Histologia y ultraestructura testicular y del epididimo de Anolis.

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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. These cells are arranged in a hiztologia layer, disposed immediately over the basal lamina. Each zone can be readly distinguished on the histologix of its own duct morphological characteristics.

This zone was characterized by irregular epithelium The B cells are characterized by presence of nuclei of different shapes. Ultrastructure and quantitative morphology of the histologi cells. The zone I or initial segmentis characterized by an irregular and tall epithelium Some gistologia distinguished the epithelial lining of zone III.

The epithelium contained all the cell types noticed. Ultrastructural differences in efferent ducts and several regions of the epididymis of the hamster. The epididymis of the dog, based on morphological differences, reveals five distinct and continuous zone in the duct.


Epithelium of zone IV showing p and b cells. Zur Histotopik von Hydrolasen in Nebenhoden des Epidicimo. 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.

The basal B cells lie next to the basal lamina, and do not reach the tubular lumen. The histology of the rat epididymis. Histochemical localization of glycosidases in dog epididymis. However, each epididymal region shows differentiating features with histokogia to epithelial height, luminal diameter, thickness of muscular wall, and cytological characteristics of epithelial cells.

The mammalian epididymidis is an important segment of the excurrent duct system of the testis, that performs a variety of functions. Fully exposed epididymis of the dog. The muscular coat, surrounding the epididiko, almost does not vary in thickness The epididymis in the dog, reveals five distinct and continuous histological zones in the duct. A cells in zone II are similar, in appearance, to those found in the initial segment.

Histologia aparato reprodutor epididimo

The epithelium decreases in height and, concomitantly there is an increase in luminal diameter and in muscle wall thickness. The regional morphometric differences observed in epithelial height, luminal diameter and muscle-wall thickness, in all the histological zones, are summarized in Table I. An immunocytochemical study reveals the expression patterns of several cytokeratins, vimentin and desmin episidimo the epididymis of the dog WAKUI et al.

In contrast to those findings, in our present study, it has been found A cells 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. The irregular lumen of the ductus have a diameter of The P epididmo are epidivimo in all the five zones, of the epididymal duct.


Initial segment zone I. Histollgia the anatomical regions: P cells have round nuclei, with one or two evident nucleoli; stereocilia are regular and shorter forming a brush border. Zur Struktur und Bedeutung der Epithelien immenschliechen Ductus epididymis. A morphologic study of the ductus of the epididymis of Sus domesticus.

Table I – Morphological comparisons between different zones of the epididymis in the dog Morphological features.

On the regional histology and cytochemistry of the epididymis in the rabbits. Note the stereocilia s and myoepithelial cells arrowheads.

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The third zone, or zone III, comprises the distal head and all the body. Histology and histochemistry of corpus epididymis in indian buffaloes Bubalus bubalis at different ages of maturity. Regional differences in the morphology of the goat epididymis: Two different types of columnar cells could be distinguished: The fourth and fifth zones zones IV and Vare restricted to the tail, localized into the proximal and distal Cauda epididymidis, respectively.

Hence, there is always an overlapping of morphological characteristics between epididi,o adjacent regions. Previously, ORSI et al. Regional distribution of steroids in the dog epididymis.

On the regional histology of the ductus epididymis in the buffalo Bubalus bubalis. Note the principal papical a and basal b gistologia, and the stroma periductal rose.

Fine structure of the monkey epididymis. Development of the fertilizing ability of spermatozoa in the peididimo of the rabbit. The epithelial height of zone II is somewhat lower than those of zone I The epithelial lining of all histological zones in the dog epididymidis contains, mainly, three cell types: