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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The P cells are observed in all the five zones, of the epididymal duct. Previously, ORSI et al. The epidivimo tubules, obtained from several sections of different epididymal regions, were measured for height of epithelium, diameter of lumen and thickness of muscle coat. Also, it should be noted that transition between the zones is gradual, not abrupt.

The epithelium contained all the cell types noticed. The epididymis in the dog, reveals five distinct and continuous histological zones in the duct. Structure and function of the ductuli efferentes, ductus epididymidis and vas deferens in mammals. Fine structure of the monkey epididymis.

B cells are seen in great number with ovoid nuclei and evident nucleoli. The duct is surrounded by a smooth muscle layer of about Regional histology and fine structure of the epididymal duct in the golden hamster Mesocricetus auratus.

Histologia aparato reprodutor epididimo

The epithelial lining measures A morphologic study of the ductus of the epididymis of Sus domesticus. Along the five regions in dog epididymidis, are found columnar cells and basal cells. Hence, there is always an overlapping of morphological characteristics between two adjacent regions.

The adluminal stereocilia are long. Each zone can be readly distinguished on the basis of its own duct morphological characteristics. The epithelial height of zone II is somewhat lower than those of zone I The epididymal lumen in zone II appears regular, and contains rather immature spermatozoa in scarce number, and also cellular remnants. The A cells are fewer in number than the other cell types, and can be distinguished from P cells by their slender globlet shape, and apically located nuclei.


They are tall cells, which extend from the basal lamina to the lumen.

The muscle coat surrounding the epididymal duct in zone IV Figs. However, in this study the zone II is restricted to the head of the dog epididymidis exclusively. Note the principal p nistologia, apical a and basal b cells, and the stroma periductal rose. 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, Note the anatomical regions: Some features distinguished the epithelial lining of zone III.

The epididymis, in all the species studied, so far is known, present variabilities in structure and function along its length. Zur Struktur und Bedeutung der Epithelien immenschliechen Ductus epididymis.

Epithelium of zone II showing p, a, and b cells, stereocilia s and stroma periductal rose. Regional histology of the epididymis of the dog. Regional differences in the morphology of the goat epididymis: Histochemical localization of glycosidases in dog epididymis.

Ultrastructural observations suggesting merocrine secretion in ihstologia initial segment of the mammalian epididymis.

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The stereocilia still are regular and shorter, forming a brush border. Initial segment zone I. The luminal diameter is It is observed zone I or initial segment and zone II, both of them localized into histtologia head.

The luminal occurrence of many packets of spermatozoa is a typical feature of this zone.

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A light microscope study. A cells are scarce and presented the same morphology, as described later. Ultrastructural differences in efferent ducts epididkmo several regions of the epididymis epiidimo the hamster. On the regional histology and cytochemistry of the epididymis in the rabbits.


Structure and function of the epithelium lining the ductuli efferentes; ductus epididymis and ductus deferens in the rat. Stellate lumen stars of the ductal sections in the zone III. The relative number of B and A cells is less frequent than in previous histological zones, and none peculiar features in both cells were seen, comparatively to those in other zones.

Several histological features differentiate the zone V from the other epididymal zones, in the dog.

Estructura del estroma conjuntivo del epididimo del bovino cebu (Bos indicus)

However, each epididymal region shows differentiating features with respect to epithelial height, luminal diameter, thickness of muscular histologai, and cytological characteristics of epithelial cells. 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.

A cells, with round to ovoid nuclei, are scarcely found, and B cells are similar to those of preceeding zones. An immunocytochemical study reveals the expression patterns of several cytokeratins, vimentin and desmin in the epididymis of the dog WAKUI et al.

The irregular lumen of the ductus have a diameter of Regional distribution of epididimi in the dog epididymis. The structure and function of the epididymis. Two different types of columnar cells could be distinguished: The epithelium decreases in height and, concomitantly there is an increase in luminal diameter and in muscle wall thickness.