The innermost cells of the cumulus oophorus are called what?

The innermost cells of the cumulus oophorus are called what?

• A. Corona Radiata cells
• B. Granulosa cells
• C. Theca interna cells
• D. Oocytes

Answer: (A)

The innermost cells surrounding the oocyte within the cumulus oophorus are the corona radiata. These cells are the closest layer to the oocyte, derived from granulosa cells, and they nourish and support the oocyte as it matures. They stay with the oocyte during ovulation and play a key role in fertilization by aiding sperm access and protection of the oocyte. The other options—granulosa cells form the broader cumulus layers, theca interna cells lie outside the granulosa layer, and the oocyte itself is the germ cell inside the layers—do not describe the innermost surrounding cell layer.

The innermost cells surrounding the oocyte within the cumulus oophorus are the corona radiata. These cells are the closest layer to the oocyte, derived from granulosa cells, and they nourish and support the oocyte as it matures. They stay with the oocyte during ovulation and play a key role in fertilization by aiding sperm access and protection of the oocyte. The other options—granulosa cells form the broader cumulus layers, theca interna cells lie outside the granulosa layer, and the oocyte itself is the germ cell inside the layers—do not describe the innermost surrounding cell layer.