Ovary: secondary follicle
The secondary follicle continues to grow, its multiple antral spaces coalescing into a single antrum. The primary oocyte remains arrested in prophase of the first meiotic division. It is surrounded by a ring of granulosal cells (the cumulus oophorus) and protrudes into the antral space. 400x
Primary oocyte nucleus
The secondary follicle continues to grow, its multiple antral spaces coalescing into a single antrum. The primary oocyte remains arrested in prophase of the first meiotic division. It is surrounded by a ring of granulosal cells (the cumulus oophorus) and protrudes into the antral space. 400x
Zona pellucida
The secondary follicle continues to grow, its multiple antral spaces coalescing into a single antrum. The primary oocyte remains arrested in prophase of the first meiotic division. It is surrounded by a ring of granulosal cells (the cumulus oophorus) and protrudes into the antral space. 400x
Cumulus oophorus
The secondary follicle continues to grow, its multiple antral spaces coalescing into a single antrum. The primary oocyte remains arrested in prophase of the first meiotic division. It is surrounded by a ring of granulosal cells (the cumulus oophorus) and protrudes into the antral space. 400x
Antrum
The secondary follicle continues to grow, its multiple antral spaces coalescing into a single antrum. The primary oocyte remains arrested in prophase of the first meiotic division. It is surrounded by a ring of granulosal cells (the cumulus oophorus) and protrudes into the antral space. 400x
Stratum granulosum
The secondary follicle continues to grow, its multiple antral spaces coalescing into a single antrum. The primary oocyte remains arrested in prophase of the first meiotic division. It is surrounded by a ring of granulosal cells (the cumulus oophorus) and protrudes into the antral space. 400x
Theca interna
The secondary follicle continues to grow, its multiple antral spaces coalescing into a single antrum. The primary oocyte remains arrested in prophase of the first meiotic division. It is surrounded by a ring of granulosal cells (the cumulus oophorus) and protrudes into the antral space. 400x
Theca externa
The secondary follicle continues to grow, its multiple antral spaces coalescing into a single antrum. The primary oocyte remains arrested in prophase of the first meiotic division. It is surrounded by a ring of granulosal cells (the cumulus oophorus) and protrudes into the antral space. 400x
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