What is the multi-layered mass of granulosa cells surrounding the oocyte called?

What is the multi-layered mass of granulosa cells surrounding the oocyte called?

• A. Zona pellucida
• B. Theca interna
• C. Cumulus oophorus
• D. Corona radiata

Answer: (C)

The multi-layered mass of granulosa cells surrounding the oocyte is the cumulus oophorus. This cluster of cells envelops the oocyte and extends into the follicle’s antrum, connecting the oocyte to the follicle wall and providing nutrients and signals essential for maturation. The zona pellucida is the glycoprotein coat around the oocyte, not the cellular cluster. Theca interna is the hormonal-producing stromal layer around the follicle, and the corona radiata refers to the innermost layer of cumulus cells closest to the zona pellucida—part of the cumulus complex but not the name for the entire surrounding mass.

The multi-layered mass of granulosa cells surrounding the oocyte is the cumulus oophorus. This cluster of cells envelops the oocyte and extends into the follicle’s antrum, connecting the oocyte to the follicle wall and providing nutrients and signals essential for maturation. The zona pellucida is the glycoprotein coat around the oocyte, not the cellular cluster. Theca interna is the hormonal-producing stromal layer around the follicle, and the corona radiata refers to the innermost layer of cumulus cells closest to the zona pellucida—part of the cumulus complex but not the name for the entire surrounding mass.