| Name: | oocyte stage II |
|---|---|
| Synonyms: | cortical-alveolar oocyte, oocytes stage II, previtellogenic oocyte, Stage 2 oocyte |
| Definition: | Oocyte part of stage II ovarian follicle. The stage II oocytes are characterized by the presence of cortical alveoli, a tripartite zona radiata (vitelline envelope), and a central germinal vesicle. |
| Ontology: | Anatomy Ontology [ZFA:0001565] |
| Name: | micropylar cell |
|---|---|
| Synonyms: | plug cell |
| Definition: | Is a specialized pore forming cell of the follicle, located adjacent to the animal pole of the oocyte. The micropylar cell makes the single micropyle (pore) through the chorion through which the sperm fertilizes the egg. |
| Ontology: | Anatomy Ontology [ZFA:0005239] |