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.

Author: Nira Tojajora
Country: Lesotho
Language: English (Spanish)
Genre: Medical
Published (Last): 1 January 2007
Pages: 120
PDF File Size: 18.55 Mb
ePub File Size: 2.80 Mb
ISBN: 747-9-87798-555-3
Downloads: 15224
Price: Free* [*Free Regsitration Required]
Uploader: Tygogami

Table I – Hitologia comparisons between different zones of the epididymis in the dog Morphological features. Initial segment zone I. Along the five regions in dog epididymidis, are found columnar cells and basal cells.

The P cells are observed in all the five zones, of the epididymal duct. The physiology of reproduction. Regional histology and fine structure of the epididymal duct in the golden hamster Mesocricetus auratus.

The last region Vis continuous to the epiiddimo deferens Fig. The fourth and fifth zones zones IV and Vare restricted to the epididymal tail, localized into the proximal and distal Cauda epididymidis, respectively.

Thus, the middle segment of the dog epididymidis, or zone III, comprises the histologka head and all the body. The epithelium contained all the cell types noticed.

The tissues were observed in a Olympus BH-2 microscope. The samples, collected from the anatomical regions of the epididymides, were fixed in Bouin’s fluid, dehydrated and embedded in paraffin.

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

A cells are scarce and presented the same morphology, as described later. The luminal diameter has average of Note the anatomical regions: The regional morphometric differences observed in epithelial height, luminal diameter and muscle-wall thickness, in all the histological zones, are summarized in Table I.

Morphology of the bovine epididymis. The adluminal stereocilia are long. Studies of the guinea pig epididymis. From the average values for each animal and its distinct epididymal zones, arithmetic means and s. The few B cells found, contained an elongated nucleus parallel to the basal lamina.

It is observed zone I and zone II, both of them localized into the head. A light microscope and ultrastructural study. The epithelial lining of all histological zones in the dog epididymidis contains, mainly, three cell types: A cells in zone II are similar, in appearance, to those found in the initial segment. The histology of the rat epididymis.

Some features distinguished the epithelial lining of zone III. Structure and function of the ductuli efferentes, ductus epididymidis and vas deferens in mammals. The epididymal lumen in zone II appears regular, and contains rather immature spermatozoa in scarce number, and also cellular remnants. B cells are seen in great number with ovoid nuclei and evident nucleoli.

Histochemical localization of glycosidases in dog epididymis. Fine structure of the monkey epididymis. Ultrastructural observations suggesting merocrine secretion in the initial segment of the mammalian epididymis. The muscular coat, surrounding the duct, almost does not vary in thickness Several histological features differentiate the zone V from the other epididymal zones, in the dog. The B cells are characterized by presence of nuclei of different shapes.


P cells are also the most common epithelial cell type found in this zone. Also, it should be noted that transition between the zones is gradual, not abrupt. This distinction concerns mainly to the overall duct histology, and also to cytological appearence and epithelial lining constitution.

The epithelium contained the same three cell types, similar to other zones. The epithelium decreases in height and, concomitantly there is an increase in luminal diameter and in muscle wall thickness.

Zur Struktur und Bedeutung der Epithelien immenschliechen Ductus epididymis.

Test Histologia aparato reprodutor epididimo

Studies on the regional histology and cytochemistry of the ductus epididymis in stallions, rams and bulls. 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 light microscope study. Casilla D Temuco mdelsol ufro. The zone I or initial segmentis characterized by an irregular and tall epithelium These cells are arranged in a distinct layer, disposed immediately over the basal lamina. Maturation, transport and fate of spermatozoa in the epididymis.

A cells, with round to ovoid nuclei, are scarcely found, and B cells are similar to those of preceeding zones. The entire epididymal duct has a similar histological appearance, showing a pseudostratified epithelial lining, with stereocilia, covered by a myo-connective tissue sheath.

A morphologic study of the ductus of the epididymis of Sus domesticus.

Previously, ORSI et al.