| Name: | oocyte stage IV |
|---|---|
| Synonyms: | mature oocytes, oocytes stage IV, postvitellogenic oocyte, Stage 4 oocyte |
| Definition: | Oocyte part of stage IV ovarian follicle. Stage IV oocytes are large and filled with noncrystalline yolky bodies. |
| Ontology: | Anatomy Ontology [ZFA:0001568] |
| Name: | vitelline envelope |
|---|---|
| Synonyms: | fertilization membrane |
| Definition: | A glycoprotein-based structure that lies outside the plasma membrane and surrounds the egg before fertilization. |
| Ontology: | GO: Cellular Component [GO:0060388] QuickGO AmiGO |