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Ultrastructural investigation of the corpora atretica of the electric ray, Torpedo marmorata.
- Source :
-
General and comparative endocrinology [Gen Comp Endocrinol] 1992 Apr; Vol. 86 (1), pp. 72-80. - Publication Year :
- 1992
-
Abstract
- Follicular atresia was studied in the ovary of the electric ray, Torpedo marmorata, by light and electron microscopy. The course of atresia may be divided into four stages. The first two comprise the dissolution of the oocyte and its phagocytosis by the small cells of the granulosa epithelium. The third stage consists of the transformation of the granulosa epithelium into an active glandular structure and is accompanied by the development of a smooth endoplasmic reticulum. The fourth stage is marked by sclerosis and pigmentary degeneration of the atretic follicle. Together these observations suggest an endocrine steroidogenic role for the corpora atretica (preovulatory corpora lutea) in T. marmorata.
- Subjects :
- Animals
Cell Nucleus ultrastructure
Cytoplasm ultrastructure
Endoplasmic Reticulum ultrastructure
Female
Granulosa Cells physiology
Granulosa Cells ultrastructure
Microscopy, Electron
Oocytes physiology
Oocytes ultrastructure
Ovary physiology
Phagocytosis
Theca Cells physiology
Theca Cells ultrastructure
Ovary ultrastructure
Torpedo anatomy & histology
Subjects
Details
- Language :
- English
- ISSN :
- 0016-6480
- Volume :
- 86
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- General and comparative endocrinology
- Publication Type :
- Academic Journal
- Accession number :
- 1505731
- Full Text :
- https://doi.org/10.1016/0016-6480(92)90127-6