D. PHILLIPS / SCIENCE PHOTO LIBRARY D. PHILLIPS / SCIENCE PHOTO LIBRARY
Cumulus cells are granulosa cells that remain with the oocyte, or female gamete, after ovulation. They are located bellow the theca interna, separated from this layer by a basement membrane. Cumulus cells, surrounding the follicle that encases the oocytes, synthesize estrogen from the androgens produce by the theca interna, like all other granulosa cells.
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