title: [Electron microscopic study of the formation of the egg membranes of the oocytes of the last year of development in the peliad].
abstract: After ovulation the egg membrane of the pelled consists of 3 layers. The homogeneous electron-dense layer comprising its major mass zona radiata, is laid as early as the stage of protoplasmatic growth of the oocyte as a result of accumulation of an electron-dense substance of a high electron density in the basement of the oocyte microvilli. The next, pectinate layer is formed from the highly electron-dense substance formed in the vacuoli of the follicular cell Golgi complex released into the subfollicular space. The most external layer - a fibrous layer - is formed due to release of large vacuoles, formed in the apical area of the follicular cells not long before ovulation. The obtained data suggest a great role of the follicular epithelium in the formation of egg membranes of the pelled.
mesh_terms: D000818:Animals; D005260:Female; D005399:Fishes / Q000033:anatomy & histology*; D006056:Golgi Apparatus / Q000648:ultrastructure; D008566:Membranes / Q000648:ultrastructure; D009865:Oocytes / Q000648:ultrastructure*; D010060:Ovulation; D010063:Ovum / Q000648:ultrastructure*; D014617:Vacuoles / Q000648:ultrastructure
vernacular_title: Elektronnomikroskopicheskie issledovaniia formirovaniia iaĭtsevykh obolochek ootsitov poslednego goda razvitiia u peliadi