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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Histologia aparato reprodutor epididimo

Histologiia P cells are observed in all the five zones, of the epididymal duct. The fourth and fifth zones zones IV and Vare restricted to the tail, localized into the proximal and distal Cauda epididymidis, respectively.

The muscular coat, surrounding the duct, almost does not vary in thickness The muscle coat is thicker The zone III comprises the distal head and all the epididymal body. Some features distinguished the epithelial lining of zone III.

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The relative number of B and A cells epidjdimo less frequent than in previous histological zones, and none peculiar features in both cells were seen, comparatively to those in other zones.

It is observed zone I and zone II, both of them localized into the head.

The luminal diameter has average of Initial segment zone I. The epididymal lumen in zone II appears regular, and contains rather immature spermatozoa episidimo scarce number, and also cellular remnants. This distinction histplogia mainly to the overall duct histology, and also to cytological appearence and epithelial lining constitution. A cells, with round to ovoid nuclei, are scarcely found, and B cells are similar to those of preceeding zones. A morphologic study of the ductus of the epididymis of Sus domesticus.


The few B cells found, contained an elongated nucleus parallel to the basal lamina.

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Hence, there is always an overlapping of morphological characteristics between two adjacent regions. Structure and function of the ductuli efferentes, ductus epididymidis and vas deferens in mammals.

A cells are scarce and presented the same morphology, as described later. Maturation, transport and fate of spermatozoa in the epididymis. Epithelium of zone II showing p, a, and b cells, stereocilia s and stroma histolpgia rose. Zur Struktur und Bedeutung der Epithelien immenschliechen Ductus epididymis. The epithelium contained all the cell types noticed.

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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.

P cells are also the most common epithelial cell type found in this zone.

This zone was characterized by irregular histoloia Regional histology and fine structure of the epididymal duct in the golden hamster Mesocricetus auratus. 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.


A light microscope study. Ultrastructure and quantitative morphology of the principal cells.

B cells are seen in great number with ovoid nuclei and evident nucleoli. The epithelial lining measures However, each epididymal region shows differentiating features with respect to epithelial height, luminal diameter, thickness of muscular wall, and cytological characteristics of epithelial cells. New York, Raven Press, Fine structure of the monkey epididymis.

hostologia The epithelium decreases in height and, concomitantly there is an increase in luminal diameter and in muscle wall thickness. The stereocilia still are regular and shorter, forming a brush border. They are tall cells, which extend from the basal lamina to the lumen. The duct is surrounded by a smooth muscle layer of about 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.