Morphology of the male reproductive duct system of Caiman crocodilus (Crocodylia, Alligatoridae)

Guerrero, Ricardo; Calderón, Martha L.; Pérez, Gloria Romero de; Ramírez‐Pinilla, Martha Patricia

doi:10.1016/s0940-9602(04)80009-8

Cited by 34 publications

(74 citation statements)

References 17 publications

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“…The ductuli efferentes of H. turcicus are lined by a cuboidal epithelium that consists of ciliated and nonciliated cells consistent with reports in mammals (Ilio and Hess, 1994), birds (Aire, 2007), and other reptiles (Guerrero et al, 2004;Akbarsha et al, 2007;Sever, 2010). In addition to being a conduit for sperm, the ductuli efferentes have been ascribed roles in fluid resorption, secretion, and spermiophagy (Hess, 2002).…”

Section: Testicular Ducts In H Turcicussupporting

confidence: 76%

“…Ciliated cells are not numerous in the rete testes of H. turcicus and more than one cilium projects into the lumen from a single cell unlike the ciliated rete cells described in mammals (Dym, 1976;Jones, 2002). Although this is the first ultrastructural study on the rete testis of a lizard, ultrastructural studies do exist on other reptiles, including a snake (Sever, 2010), a turtle (Holmes and Gist, 2004) and a crocodilian (Guerrero et al 2004). None of these other reptilian studies has reported cilia in the rete testis.…”

Section: Discussionmentioning

confidence: 99%

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Proximal Testicular Ducts of the Mediterranean Gecko (Hemidactylus turcicus)

Rheubert

Sever

Geheber

et al. 2010

The Anatomical Record

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The efferent ducts of the Mediterranean Gecko, Hemidactylus turcicus (Gekkonidae) were investigated using light and electron microscopy. The seminiferous tubules unite into a single rete testis tubule. The rete testis divides into 3-4 ductuli efferentes which all drain into the cranial portion of the ductus epididymis. All efferent ducts are most active during the months of December to August. The rete testis is composed of a simple squamous epithelium with bifurcated nuclei and a labyrinthine network of intercellular canaliculi. Ciliated and nonciliated cells are present, and more than one cilium extends from the scattered ciliated cells. The presence of small clear vesicles and widened intercellular canaliculi suggest that cells of the rete testis are responsible for intake of luminal fluids. The ductuli efferentes are composed of a simple cuboidal epithelium consisting of ciliated and nonciliated cells, and ciliated cells are the dominant cell type. During the inactive season the number of lysosomes increases and the cells become spermiophagic. The ductus epididymis is composed of a tall pseudostratified columnar epithelium with relatively scarce basal cells. No evidence for regionalization was observed. The ductus epididymis is highly secretory during the active season with numerous electron-dense secretory granules, whose glycoprotein products are released by merocrine secretion. Basally, the active epididymis has swollen intercellular canaliculi and enlarged cisternae of rough endoplasmic reticulum. During the inactive season the secretory activity decreases and membranous structures and fibrous material are observed within widened intercellular canaliculi apical to the basal cells. Anat Rec, 293:2176Rec, 293: -2192

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Section: Testicular Ducts In H Turcicussupporting

confidence: 76%

Section: Discussionmentioning

confidence: 99%

Proximal Testicular Ducts of the Mediterranean Gecko (Hemidactylus turcicus)

Rheubert

Sever

Geheber

et al. 2010

The Anatomical Record

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“…By light microscopy, in snakes (Bothrops jararaca and Crotalus durissus), epithelial cells showed microvilli which were not observed in scorpion mud turtle, even though similar secretion was observed by the epithelium (Almeida-Sousa 2005). Similarity was described on close species, such as the crocodile (Guerrero et al 2004), and birds, particularly in the rooster (Tingari 2001). In the snake Seminatrix pygaea of South Carolina, was observed arrangement of spermatozoids tangent to the epithelium, most being slightly separated from epithelium (Ssever 2004).…”

Section: Discussionsupporting

confidence: 52%

“…In this study of scorpion mud turtle, it is believed that vas deferens is also adapted for storage, due to its structural characteristics such as absence of cilia or stereocilia in the cells. On crocodiles (Caiman crocodilus), non-ciliated cells were also found, indicating storage function of vas deferens in another species of reptiles (Guerrero et al 2004).…”

Section: Discussionmentioning

confidence: 98%

“…These ultrastructural features of principal cells seems to be indicative of the occurence of active processes of endocytosis, and degenerative characteristics were observed at the supranuclear cytoplasm of epididimary P cells on autumn (Orsi et al 2007). On crocodiles, endoplasmic reticulum was also abundant, indicating protein production, despite of absence of visible secretory material (Guerrero et al 2004).…”

Section: Discussionmentioning

confidence: 99%

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Seasonal morphological variation of the vas deferens of scorpion mud turtle (Kinosternon scorpioides)

et al. 2014

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http://dx.doi.org/10.1590/1676-06032014006413Abstract: This study aimed to characterize the morphology of the vas deferens of Kinosteron scorpioides by macroscopic and microscopic analysis. Were used 20 adult male jurará s collected at regular intervals during the year and divided into four experimental groups in the rainy and dry seasons, being processed for light microscopy, scanning electron microscopy and transmission electron microscopy. Morphometry for tubular and luminal diameters and epithelial height were also performed. On rainy season, vas deferens presented pseudostratified epithelium with cylindrical cells, spermatozoids and milky fluid in the lumen, with cytoplasmic organelles and lipid vesicles. On dry season, epithelium was pseudostratified with cuboid cells, with cellular debris and no spermatozoids. Resumo: Este estudo teve como objetivo caracterizar a morfologia dos ductos deferentes de Kinosteron scorpioides por meio de aná lise macroscó pica e microscó pica. Foram utilizados 20 machos adultos, coletados em intervalos regulares durante o ano, os quais foram divididos em quatro grupos experimentais nas estaçõ es chuvosa e seca. Os ductos deferentes foram processados para aná lise por microscopia de luz, microscopia eletrô nica de varredura e microscopia eletrô nica de transmissão. Morfometria para diâ metros tubular e luminal e altura epitelial também foram realizadas. Na época das chuvas, o ducto deferente apresentou epitélio pseudoestratificado com células cilíndricas, espermatozoides e líquido leitoso no lú men, além de com organelas citoplasmá ticas e vesículas lipídicas. Na estaçã o seca, o epitélio do ducto deferente foi do tipo pseudoestratificado com células cuboides e debris celulares, sendo que nenhum espermatozoide foi encontrado nesta estaçã o. Houve variaçã o significativa (p ,0,05) para a morfometria dos ductos deferentes, com menores valores de diâ metros tubular e luminal na estaçã o chuvosa, e maior altura do epitélio na estaçã o seca.

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Morphological Changes of the Epididymis and Description of the Excurrent Ducts of Phrynops geoffroanus (Testudines: Chelidae) During the Reproductive Cycle

Cabral

Zieri

Franco‐Belussi

et al. 2010

The Anatomical Record

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The seminal ducts (efferent ductule, epididymis, and deferent duct) in adults of Phrynops geoffroanus were examined using light microscopy. A series of tubules (efferent ductules) connect the testes to the epididymides. The efferent ductules are formed by a rete of small tubules of varying diameters, with simple columnar epithelium formed by the ciliated cells, nonciliated cells, and few basal cells. The epididymis is a simple, long and highly convoluted tubule that receives the efferent ductules throughout its extension. It is covered by a pseudostratified columnar epithelium with three cellular types: the principal cells, which are the most abundant, basal cells, and a small narrow cell. The histological differences in the epididymis region (cranial, medial, and caudal), as well as the differences in the epithelium throughout the reproductive cycle, are discussed. The deferent ducts consist of a low pseudostratified epithelium with two cellular types: the principal and basal cells. During the months analyzed, spermatozoa were stored in the epididymis, and deferent ducts were found. Anat Rec, 294:145-155, 2011. V V C 2010 Wiley-Liss, Inc.

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Morphology of the male reproductive duct system of Caiman crocodilus (Crocodylia, Alligatoridae)

Cited by 34 publications

References 17 publications

Proximal Testicular Ducts of the Mediterranean Gecko (Hemidactylus turcicus)

Proximal Testicular Ducts of the Mediterranean Gecko (Hemidactylus turcicus)

Seasonal morphological variation of the vas deferens of scorpion mud turtle (Kinosternon scorpioides)

Morphological Changes of the Epididymis and Description of the Excurrent Ducts of Phrynops geoffroanus (Testudines: Chelidae) During the Reproductive Cycle

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