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| Description: In later stages of development, the primary oocyte is surrounded by several layers of cuboidal and low-columnar cells (granulosa cells). The glycoprotein zona pellucida forms between the primary oocyte and the granulosa cells. As maturation continues, the primary follicle develops into a secondary follicle. The theca folliculi forms from stromal cells. Picture Stats: Views: 468 Filesize: 1.53MB Height: 900 Width: 1080 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=40567 |