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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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P cells have round nuclei, with one or two evident nucleoli; stereocilia are regular and shorter forming a brush border. This distinction concerns mainly to the overall rpididimo histology, and also to cytological appearence and epithelial lining constitution.

A cells in zone II are similar, in appearance, to those found in the initial segment. The tissues were observed in a Olympus BH-2 microscope.

Casilla D Temuco mdelsol ufro. Initial segment zone I. The epithelial lining measures A cells, with round to ovoid nuclei, are hisgologia found, and B cells are similar to those of preceeding zones.

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Morphology of the bovine epididymis. It is observed zone I or initial segment and zone II, epididmo of them localized into the head. The epididymal lumen in zone II appears epidicimo, and contains rather immature spermatozoa in scarce number, and also cellular remnants.

Along the five regions in dog epididymidis, are found columnar cells and basal cells. Histology and histochemistry of corpus epididymis in indian buffaloes Bubalus bubalis at different ages of hjstologia.

Despite such studies, stressing the importance of the morphofunctional knowledge of the dog epididymidis, little information is available on the regional histology of the duct ORSI, The last region Vis continuous to the vas deferens Fig.


Hence, there is always an overlapping of morphological characteristics between two adjacent regions.

Thus, the purpose of this study is to describe morphologically the 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. Epithelium of zone II showing p, a, and b cells, stereocilia s and stroma periductal rose.

Histologia aparato reprodutor epididimo

Also, it should be noted that transition between the zones is gradual, not abrupt. The physiology of reproduction.

P cells are also the most common epithelial cell type found in this zone. The epididymis, in all the species studied, so far is known, present variabilities in structure and function along its length. The fourth and histologiaa zones epididijo IV and Vare restricted to the tail, localized into the proximal and distal Cauda epididymidis, respectively. Zur Yistologia von Hydrolasen in Nebenhoden des Hundes. The zone III comprises the distal head and all the epididymal body. Studies of the guinea pig epididymis.

The regional morphometric differences observed in epithelial height, luminal diameter and muscle-wall thickness, in all the histological zones, are summarized in Table I.

B cells are seen in great number with ovoid nuclei and evident nucleoli. The epithelium contained all the cell types noticed.

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Several histological features differentiate the zone V from the other epididymal zones, in the dog. A light microscope and ultrastructural study.


Note the anatomical regions: The luminal occurrence of many packets of spermatozoa is a typical feature of this zone. Previously, ORSI et al. The samples, collected from the anatomical regions of the epididymides, were fixed in Bouin’s fluid, dehydrated and embedded in paraffin. 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.

The fourth and fifth zones zones IV and Vare restricted to the epididymal tail, localized into the proximal and distal Cauda epididymidis, respectively.

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epididumo Ultrastructural differences in efferent ducts and several regions of the epididymis of the hamster. The position and shape of their nuclei are variable, along the length of the duct Figs.

A light microscope study. From the average values for each animal and its distinct epididymal zones, arithmetic means and s. P cells were the major cell histilogia, and possessed slightly shorter; irregular stereocilia, with ovoid and elongated nuclei located at the middle part of the cells.

These cells are arranged in a distinct layer, disposed immediately over the basal lamina.