Histology and functional morphology of the oviduct of an oviparous snake,Diadophis punctatus

Perkins, M. Jane; Palmer, Brent D.

doi:10.1002/(sici)1097-4687(199601)227:1<67::aid-jmor5>3.0.co;2-m

Cited by 55 publications

(85 citation statements)

References 25 publications

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“…However, the cytology of cells forming the sperm storage tubules in the anterior uterus is unique in ultrastructure due to its multifunction. Being different from the uterine tube, which resembles the avian magnum in birds and is the site for albumen synthesis (Aitken and Solomon, 1976;Guillette, 1990, 1992), the reptilian uterus was believed to have dualistic functions in producing both membranous and calcareous layers of the eggshell Guillette, 1990, 1991;Perkins and Palmer, 1996), and even as a important organs to stored spermatozoa.…”

Section: Discussionmentioning

confidence: 99%

“…The endometrial glands of the uterus have been identified in various chelonians and squamates, including the snapping turtle, as the site of eggshell membrane formation (Guillette et al, 1989;Palmer and Guillette, 1992;Perkins and Palmer, 1996). Palmer and Guillette, (1990) using [ 3 H]leucine and explant cultures in the turtle, Pseudemys s. scripta, showed that albumen proteins are synthesized and secreted in vitro by the uterine tube and that the endometrial glands of the uterus contain numerous spherical, electron dense secretory granules, similar to those of the avian isthmus that secrete the proteinaceous fibers of the eggshell membranes.…”

Section: Granules In Gland Cellsmentioning

confidence: 99%

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Ultrastructure of Anterior Uterus of the Oviduct and the Stored Sperm in Female Soft‐Shelled Turtle,Trionyx sinensis

Han

Zhangli

et al. 2008

The Anatomical Record

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Ultrastructure of sperm storage in female soft-shelled turtle, Trionyx sinensis was examined under light and electron microscopes. Sperm storage tubules are restricted to the anterior of the uterus. These tubules developed either by folding or fusion of the oviductal mucosal folds and are lined by both ciliated and secretory cells. Ciliated cells are characterized by a few microvilli and prominent cilia in the apical membranes. A prominent feature of the secretory cell is the presence of secretory granules in the supranuclear region. The size, shape, and electron density of these granules vary markedly. The secretory product is released mainly by exocytosis into the oviductal lumen, where it appears as flocculent material. The unique structure in the base of the epithelium, the basal border of the cell-the basal lamina-and a blood vessel layer, is presumed to be a important barrier, by which the nourishment exchange and the microenvironment maintenance are ensured. The gland cell is presented with numerous, round, membrane-bound secretory granules of moderate to high electron densities. We divide these granules into three types according to their appearance: (1) membrane bounded granules with high-homogeneous electron density, (2) membrane bounded granules with moderate-homogeneous electron density, (3) membrane bounded, electron dense granules with concentric structures. These granules are presented as different stages of the secretions in the gland cell. The junction complexes are markedly distributed between cells, which are important in keeping stability and the microenvironment maintenance of the sperm storage tubules. Sperm stored in the tubules are heterogeneous in cytology. In addition to the mature sperm in the lumen, sperm with large chromatic granules are found, which are presumed to be immature sperm and are being in the process of nuclear condensation. Several spermatozoa in the tubules are exhibited with definitive indications of degeneration of the nuclei. The nuclear volume increases. The electron density of the central cores in mitochondria declines, combined with the deterioration of concentric membrane structure. Those changes are possibly due to the long time storage of the sperm in sperm storage tubules, and the leakage of reactive oxygen species is suggested to be a major cause. We conclude that the ultrastructure character of sperm storage in the oviduct

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Section: Discussionmentioning

confidence: 99%

Section: Granules In Gland Cellsmentioning

confidence: 99%

Ultrastructure of Anterior Uterus of the Oviduct and the Stored Sperm in Female Soft‐Shelled Turtle,Trionyx sinensis

Han

Zhangli

et al. 2008

The Anatomical Record

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“…Following the criteria of Blackburn (1998), three basic divisions of the oviduct could be recognized grossly: infundibulum (with a posterior region of sperm storage tubules, SSTs), uterus, and vagina. The posterior infundibulum where SSTs are found has been referred to as the uterine tube by some authors (e.g., Perkins and Palmer, 1996).…”

Section: Methodsmentioning

confidence: 99%

Ultrastructure of the reproductive system of the black swamp snake (Seminatrix pygaea). II. Annual oviducal cycle

et al. 2000

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This article is the first ultrastructural study on the annual oviducal cycle in a snake. The ultrastructure of the oviduct was studied in 21 females of the viviparous natricine snake Seminatrix pygaea. Specimens were collected and sacrificed in March, May, June, July, and October from one locale in South Carolina during 1998 -1999. The sample included individuals: 1) in an inactive reproductive condition, 2) mated but prior to ovulation, and 3) from early and late periods of gravidity. The oviduct possesses four distinct regions from cranial to caudal: the anterior infundibulum, the posterior infundibulum containing sperm storage tubules (SSTs), the uterus, and the vagina. The epithelium is simple throughout the oviduct and invaginations of the lining form tubular glands in all regions except the anterior infundibulum and the posterior vagina. The tubular glands are not alveolar, as reported in some other snakes, and simply represent a continuation of the oviducal lining with no additional specializations. The anterior infundibulum and vagina show the least amount of variation in relation to season or reproductive condition. In these regions, the epithelium is irregular, varying from squamous to colum-nar, and cells with elongate cilia alternate with secretory cells. The secretory product of the infundibulum consists largely of lipids, whereas a glycoprotein predominates in the vagina; however, both products are found in these regions and elsewhere in the oviduct. In the SST area and the anterior vagina, tubular glands are compound as well as simple. The epithelium of the SST is most active after mating, and glycoprotein vacuoles and lipid droplets are equally abundant. When present, sperm form tangled masses in the oviducal lumen and glands of the SST area. The glands of the uterus are always simple. During sperm migration, a carrier matrix composed of sloughed epithelial cells, a glycoprotein colloid, lipids, and membranous structures surround sperm in the posterior uterus. During gravidity, tubular glands, cilia, and secretory products diminish with increasing development of the fetus, and numerous capillaries abut the basal lamina of the attenuated epithelial lining of the uterus.

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“…O sistema reprodutivo feminino é formado por dois ovidutos pareados, sendo o oviduto direito mais longo do que o esquerdo (PERKINS;PALMER, 1996). Os ovidutos podem ser divididos em várias regiões por meio da função e estrutura dessas regiões Desenho: Diego Muniz, 2011.…”

Section: Fêmeasunclassified

Ciclo reprodutivo da caninana, Spilotes pullatus (Linnaeus, 1758) (SERPENTES: COLUBRIDAE)

Muniz-da-Silva¹

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Histology and functional morphology of the oviduct of an oviparous snake,Diadophis punctatus

Cited by 55 publications

References 25 publications

Ultrastructure of Anterior Uterus of the Oviduct and the Stored Sperm in Female Soft‐Shelled Turtle,Trionyx sinensis

Ultrastructure of Anterior Uterus of the Oviduct and the Stored Sperm in Female Soft‐Shelled Turtle,Trionyx sinensis

Ultrastructure of the reproductive system of the black swamp snake (Seminatrix pygaea). II. Annual oviducal cycle

Ciclo reprodutivo da caninana, Spilotes pullatus (Linnaeus, 1758) (SERPENTES: COLUBRIDAE)

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