Aabid Hussain
Last Activity: 8 Years ago
Hi Sheeba,
Thank you for asking
-In Primary follicle the ova is surrounded by a single layer of epithellium. It develops just after attaining puberty.
-A secondary follicle is a preantral follicle with 2 to 10 layers of cuboidal or low columnar cells that form a stratified epithelium.
-Tertiary Follicle:When a preantral follicle completes the secondary stage in development, it contains five distinct structural units: a fully grown oocyte surrounded by a zona pellucida, six to nine layers of granulosa cells, a basal lamina, a theca interna, and a theca externa
