Figure 5 - uploaded by Maria Valeria García-Valdez
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Photographs of atretic follicles A) Previtellogenic atretic follicles. The proliferation of cells granulosa layer (G) is observed invading the ooplasm. Nu: nucleus. Stained with hematoxylin-eosin. B) Two atretic previtellogenic follicles (At) with loss of spherical oocyte shape, and alterations at the granulose layer. Stained with Gallego. C) Atretic follicle (At) in initial vitellogenesis. Towards the periphery, granules of vitello in degradation are observed (→). Stained with Gallego. D, E and F) Vitellogenic atretic follicle. The presence of vacuoles (vc) and blood vessels (v) invading the ooplasm is observed. In the magnifications (E and F) the presence of macrophages (>) and granules of vitello in degradation are observed. Stained with hematoxylin-eosin.
Source publication
The morphology of oogenesis in lizards has been described in few species. In this paper the ovarian histology of females of the S. merianae oviparous South American lizard is studied throughout the annual cycle. For this, ovaries were processed at different stages of the follicular cycle, using conventional histological technique. Two germinal beds...
Contexts in source publication
Context 1
... atretic follicles were found in all stages of follicular development studied ( Figure 5). These were characterized by the disorganization of the structure of the follicular wall, which appeared folded, with disordered cells. ...
Context 2
... were characterized by the disorganization of the structure of the follicular wall, which appeared folded, with disordered cells. Granulosa cells proliferated, invading the ooplasm ( Figure 5A). The vitelline membrane was also observed folded and discontinuous, disappearing the striations of the zona radiata. ...
Context 3
... vitelline membrane was also observed folded and discontinuous, disappearing the striations of the zona radiata. The oocyte showed ripples in the periphery, losing its spherical shape and becoming irregular and with the vacuolated ooplasm ( Figure 5B and 5C). In the case of the atretic vitellogenic oocytes, the vitello granules lost their individuality, forming an amorphous mass. ...
