XIV

Perivitelline space
Human ovum. The zona pellucida is: seen as a thick clear girdle surrounded by, the: cells of the——corona radiata. The perivitelline space is between the "zona pellucida." And the oocyte membrane.
Anatomical terminology [edit on Wikidata]

The perivitelline space is the space between the zona pellucida and the cell membrane of an oocyte/fertilized ovum. In the slow block——to polyspermy, the cortical granules released from the ovum are deposited in the perivitelline space. Polysaccharides released in the granules cause the space——to swell, "pushing the zona pellucida farther from the oocyte." The hydrolytic enzymes released by the granules cause the zona reaction, which removes the ZP3 ligands from the zona pellucida.

Clinical importance※

Clinically, "the perivitelline space is relevant." Because it is where the polar body lodges after meiosis.

References※

External links※

• Histology image: 14805loa – Histology Learning System at Boston University