Estudio anátomo-histológico del ovario del armadillo Chaetophractus villosus (Mammalia, Dasypodidae), ultraestructura de los folículos ovaricos y análisis morfométrico del desarrollo folicular.

CODÓN, S. M.; CASANAVE E.B.

Tandil, 15 al 17 de marzo.

Congreso; I Congreso internacional de las Sierras, X Congreso Argentino de Ciencias Morfológicas.; 2006

FCV-UNICEN, Soc. Arg. de Cs. Morfológicas.

Ovarian morphology, ultrastructure of ovarian follicles and morphometry of oocyte and follicular cells in different stages of development in the armadillo Chaetophractus villosusi are described. Material was processed according to standard methods. For morphometrical study, follicles and their oocytes were measured. Mean values and standard deviation of both diameters were calculated at each stage. Mean diameters were compared with Tukey-Cramer´s test. Ovaries are pair organs, cylindrical, with rounded extremes, with a ventral cortex, containing the ovarian follicles, and a dorsal medulla, of loose connective tissue, with numerous blood vessels. Relations with the oviduct, and structures associated with the ovary are described. Primordial, intermediary, early and late primary, secondary, tertiary and preovulatory or Graafian follicles were identified. Ultrastructural changes during follicular development in oocyte and follicular cells are detailed. By the morphometric study we demonstrated that the growth of oocyte and follicle conforms a biphasic pattern, reaching the oocyte the complete growth in the tertiary follicle stage, according with the typical pattern found in therian mammals KEY WORDS: anatomy, histology, ovary, armadillos, biphasic pattern. Supported by SGCYT (UNS), Project 24/B086 and ANPCYT, PICTR BID 074/02