scholarly journals Appearance of Peculiar Multivesicular Bodies in the Principal Cells of the Epididymal Duct after Efferent Duct Cutting in the Mouse

1984 ◽  
Vol 47 (2) ◽  
pp. 121-135 ◽  
Author(s):  
Kazuhiro ABE ◽  
Hiroko TAKANO ◽  
Takashi ITO
Keyword(s):  
Multivesicular Bodies ◽  
Efferent Duct ◽  
Principal Cells ◽  
Epididymal Duct

The structure and function of the epididymis. 2. The histogenesis of the rat epididymis.

1959 ◽  
Vol 7 (1) ◽  
pp. 22 ◽  
Author(s):  
BL Reid
Keyword(s):  
Connective Tissue ◽  
Ciliated Cells ◽  
Efferent Duct ◽  
White Rats ◽  
Efferent Ducts ◽  
Caudal Portion ◽  
Rat Epididymis ◽  
Nuclear Differentiation ◽  
And Function ◽  
Epididymal Duct

Observations were made on the epididymides of young white rats of the following ages: 3, 21, 28, 32, 37, 39, 56, 72, 96, 110 days. Both efferent ducts and epididymal duct are undifferentiated at 21 days with a similar cuboidal epithelium. The connective tissue coat of the efferent ducts is one cell thick whereas that of the epididymal duct is two or three cells thick. The possible involvement of the connective tissue in the process of histogenesis is discussed. Differentiation within the epididymal duct commences at 28 days when the epithelium in the cephalic portion is tall and that in the caudal portion of the head and remainder of the tail is tall with isolated segments of low columnar epithelium. The latter epithelium is associated with a wider lumen which evidently becomes continuous down the duct. In the efferent ducts at this stage ciliated cells have appeared. Differentiation of the cephalic portion of the head is completed rapidly by the 37th day but that of the caudal portion of the head and tail of the organ is completed only at the 96th day. In certain zones, histodifferentiation is accompanied by obvious nuclear differentiation. Spermatozoa first appear in the testis at 56 days but do not enter and fill the epididymal ducts until 72 days. There is evidence of an outflow of fluid from the testis which carries spermatocytes and spermatids into the duct at 32 days. The changes in the epithelium of the efferent duct, the epididymis, and the deferent duct from the 3rd to the 110th day are tabulated.

The structure and fuction of the Epididymis. 1. The histology of the Rat Epididymis.

1957 ◽  
Vol 5 (3) ◽  
pp. 223 ◽  
Author(s):  
KW Cleland
Keyword(s):  
Unit Volume ◽  
Cell Types ◽  
Histological Techniques ◽  
Principal Cells ◽  
White Rats ◽  
Efferent Ducts ◽  
Rat Epididymis ◽  
Histological Characteristics ◽  
Definition Of ◽  
Epididymal Duct

Epididymides from six white rats have been examined by standard histological techniques. The epididymis, consisting of rete, efferent ducts, and epididymal duct possesses an epithelium containing six cell types-principal, basal, ciliated, apical, halo, and clear cells-each of which is described. Cytoplasmic differences in the principal cells permit two zones to be recognized in the efferent ducts. The principal cells along the length of the epididymal duct vary in a number of features such as: height, depth and distribution of staining, the incidence, size, and intracellular distribution of vacuoles, the shape of the nuclei, and the distribution of chromatin within them. Such differences permit definition of six major zones, some of which may be further subdivided. Variations in the histological characteristics of the various zones in different individuals have been described. These zones have been related to the usual anatomical divisions of head, isthmus, and tail. The lumen of the epididymis contains spermatids and their breakdown products in addition to spermatozoa. The latter vary in density (number per unit volume), and in their arrangement with respect to one another, in the various zones of the efferent epididymal ducts. The implications of these histological findings in the physiology of the epididymis are discussed.

The Origin and Development of Smooth Muscle and Contractility in the Ductus Epididymidis of the Rat

Development ◽  
1963 ◽  
Vol 11 (2) ◽  
pp. 369-382
Author(s):  
Robert L. Van De Velde ◽  
Paul L. Risley
Keyword(s):  
Smooth Muscle ◽  
Guinea Pig ◽  
Contractile Activity ◽  
Smooth Muscles ◽  
Duct System ◽  
Efferent Duct ◽  
Functional Aspects ◽  
Probable Occurrence ◽  
Storage Place ◽  
Epididymal Duct

The contractile activity of smooth muscles of the epididymal duct has long been overlooked in discussions relating to functional aspects of the epididymis and the problem of sperm transport in the male. Benoit (1926) described the occurrence of smooth muscle fibers, circularly arranged, surrounding the efferent ductuli and ductus epididymidis. Young and co-workers (1929–1931) emphasized that currents produced by vibrant cilia of the ductuli efferentes, the continued production of sperm in the testis, and the pressure of fluids transferred across the germinal epithelium to the lumina of the efferent duct system were responsible primarily for the movement of spermatozoa through the epididymis to their storage place in the caudal end of this organ prior to emmission. Simeone (1933) described contractile movements in the excised epididymis of the guinea-pig, and, although she discussed the probable occurrence also of peristaltic action, she concluded that the activity was mainly of a segmentationlike character.

Ultrastructure of Liver in Lactosyl Ceramidosis

1971 ◽  
Vol 29 ◽  
pp. 312-313
Author(s):  
Z. Hruban ◽  
J. R. Esterly ◽  
G. Dawson ◽  
A. O. Stein
Keyword(s):  
Connective Tissue ◽  
Liver Biopsy ◽  
Osmium Tetroxide ◽  
Close Contact ◽  
Multivesicular Bodies ◽  
Bile Canaliculi ◽  
Dense Bodies ◽  
Marginal Plates ◽  
Membranous Material ◽  
Perichromatin Granules

Samples of a surgical liver biopsy from a patient with lactosyl ceramidosis were fixed in paraformaldehyde and postfixed in osmium tetroxide. Hepatocytes (Figs. 1, 2) contained 0.4 to 2.1 μ inclusions (LCI) limited by a single membrane containing lucid matrix and short segments of curved, lamellated and circular membranous material (Fig. 3). Numerous LCI in large connective tissue cells were up to 11 μ in diameter (Fig. 2). Heterogeneous dense bodies (“lysosomes”) were few and irregularly distributed. Rough cisternae were dilated and contained smooth vesicles and surface invaginations. Close contact with mitochondria was rare. Stacks were small and rare. Vesicular rough reticulum and glycogen rosettes were abundant. Smooth vesicular reticulum was moderately abundant. Mitochondria were round with few cristae and rare matrical granules. Golgi complex was seen rarely (Fig. 1). Microbodies with marginal plates were usual. Multivesicular bodies were very rare. Neutral lipid was rare. Nucleoli were small and perichromatin granules were large. Small bile canaliculi had few microvilli (Fig. 1).

Structural studies of phosphoinositide 3-kinase-dependent traffic to multivesicular bodies

2007 ◽  
Vol 74 (1) ◽  
pp. 47 ◽  
Author(s):  
Hsiangling Teo ◽  
David J. Gill ◽  
Ji Sun ◽  
Olga Perisic ◽  
Dmitry B. Veprintsev ◽  
...  
Keyword(s):  
Multivesicular Bodies ◽  
Structural Studies ◽  
Phosphoinositide 3 Kinase
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