The Intertubular Tissue of the Testis

Hooker, Charles W.

doi:10.1016/b978-0-12-386601-1.50014-7

Cited by 43 publications

(31 citation statements)

References 194 publications

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“…Guraya (1980) found an increased of testosterone production with the corresponding increased in number of interstitial endocrine cells. Similar opinion was also expressed by Hooker (1970), who further contradicted the same stating that the type of interstitial endocrine cells rather than total number was a significant consideration. Therefore, in view of present study, it could be opined that steriodogenesis might have started around 56 th day of intra uterine life onwards in goat foetal testis.…”

Section: Interstitial Endocrine Cells (Leydig Cells)at 44mentioning

confidence: 63%

Histological and Histochemical Studies on the Prenatal Development of Testis in Goat (Capra hircus)

2012

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studies on the prenatal development of testis in goat (Capra hircus). Int. J. Morphol., 30(4):1408-1421, 2012. SUMMARY:The study has been conducted on the prenatal development of testis on 70 goat embryo/foeti, categorized into group-I (0-30 days), Group-II (31-60 days), Group-III (61-90 days), Group-IV (91-120 days) and group V (121days-till birth), having 14 embryos/ foeti in each group. The genital ridge was observed at 23 days of gestation. It contained an accumulation of mesenchymal cells, immature RBC's, differentiating fibroblasts and primordial germ cells. The formation of sex cords was evidenced on 44 th day of gestation. It contained small mesenchymal cells and large cells arranged in a chain like manner. The convolution of the sex cords started between 61-90 days of gestation, which increased with the increase in the gestation period and at 125 day of gestation few sex cords attained the form of reverse question mark. The sustentocytes (Sertoli cells) were observed among the small cells of sex cords at 56 th day of gestation. The tunica albuginia appeared just beneath the germinal epithelium at 44 th day of gestation. It consisted of 2-4 layers of mesenchymal cells, fibroblasts and small capillaries. The thickness of tunica albuginia increased with the increase in the age of foetus and between 61-90 days of gestation, the outer thick fibrous and inner thin vascular layer could be demarcated separately. Few mesenchymal cells start differentiating into interstititial endocrine cells (Leydig cells) located in the interstitial spaces at 44 th day of gestation.

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Section: Interstitial Endocrine Cells (Leydig Cells)at 44mentioning

confidence: 63%

Histological and Histochemical Studies on the Prenatal Development of Testis in Goat (Capra hircus)

2012

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“…According Hooker (1970), the intertubular compartment consists of different components allocated between the seminiferous tubules, among which are connective tissue, blood and lymph vessels, and Leydig cells or interstitial cells, the main components of this compartment. These same components were found in both morphological study of Leopardus colocolo as Leopardus tigrinus in a morphofunctional study by Balarini (2008).…”

Section: Discussionmentioning

confidence: 99%

Morphology of the testes and epididymal ducts in the pampas cat Leopardus colocolo (Molina, 1782)

2016

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The pampas cat Leopardus colocolo (Molina, 1782) is a species of the Felidae family, widely distributed in South America, included on CITES Appendix II and classified as Near Threatened on the IUCN Red List, with population trend decreasing. Based on this information, the objective of this study is to describe morphologically the testes and epididymal ducts of pampas cat. The animal, coming from the Federal University of Mato Grosso Zoo, Brazil, had died after anesthesia procedure and the male reproductive system was dissected to collect the testicles. The samples taken were fragmented and histologically examined. From the microscopic analysis of the testes were identified: vaginal and tunica albuginea, formed by dense connective tissue modeled with large amount of collagen fibers. The tunica albuginea fibrous septa emits into the body. The seminiferous tubules are coiled and coated internally by spermatogenic epithelium consisting of Sertoli cells, surrounded by a basement membrane in the presence of myoid cells. The interstitial tissue between the seminiferous tubules, is composed of loose connective tissue, blood and lymph vessels, and Leydig cells in polyhedral shape. The epididymal ducts showed pseudostratified columnar epithelium with secretory cells of which stereocilia design, situated on a basement membrane filled by myoid cells. This epithelium has principal and basal cells, the main cell design stereocilia toward the lumen of the epididymal duct.

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“…When the cell is near to vessel walls or to the tunica propria of the seminiferous tubules, the nucleus adjusts to the elongated pattern of the cell and presents an elliptic shape. 13 The existence of a layer of heterochromatin closely associated to the nuclear envelope is a universal characteristic of Leydig cells. 14 In Leydig cells of collared peccaries, as shown in table 1, the nucleus occupies a proportion similar to that of other species, about 10 to 15% 15 , but less than half the value reported for wild boars 10 (30%).…”

Section: Discussionmentioning

confidence: 99%

Morfometria das células de leydigem catetos (Tayassu tajacu)

Silva

Silveira

2007

Braz. J. Vet. Res. Anim. Sci.

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This work aimed to determine total and individual volume of Leydig cells, leydigosomatic index and the number of Leydig cells per testis and per gram of testis in the collared peccary (Tayassu tajacu). Testes were collected from sexually mature collared peccaries, destined for commercial slaughter. Total and individual volumes of Leydig cells were 2.02 ml and 1,202.74 x 10 -12 ml, respectively. The leydigosomatic index was 0.022%, and the number of Leydig cell per testis and per gram of testis was 1.7 billion and 92.12 million, respectively. These results show that morphometric characteristics of Leydig cells in collared peccaries are similar to average results observed for most of the mammalian species studied.

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The Intertubular Tissue of the Testis

Cited by 43 publications

References 194 publications

Histological and Histochemical Studies on the Prenatal Development of Testis in Goat (Capra hircus)

Histological and Histochemical Studies on the Prenatal Development of Testis in Goat (Capra hircus)

Morphology of the testes and epididymal ducts in the pampas cat Leopardus colocolo (Molina, 1782)

Morfometria das células de leydigem catetos (Tayassu tajacu)

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