The tertiary follicle is comprised of several key components:
Oocyte: The central cell that will eventually be ovulated. Granulosa cells: These cells surround the oocyte and are involved in the production of estrogen and other factors crucial for follicle development. Theca cells: Located outside the granulosa cell layer, these cells are divided into the theca interna and theca externa. The theca interna is involved in androgen production, which granulosa cells convert to estrogen. Antrum: The fluid-filled cavity that defines the tertiary follicle. Cumulus oophorus: A cluster of granulosa cells that anchor the oocyte to the follicle wall. Zona pellucida: A glycoprotein layer surrounding the oocyte.
