| Name: | ball |
|---|---|
| Synonyms: | yolk ball |
| Definition: | The anterior round region of the yolk cell present after the yolk extension forms during the segmentation period. |
| Ontology: | Anatomy Ontology [ZFA:0000006] |
| Name: | vH ionocyte |
|---|---|
| Synonyms: | HR cell, VH-MRC |
| Definition: | Integument ionocyte rich in vacuolar-type H+ ATPase and carbonic anhydrase. |
| Ontology: | Anatomy Ontology [ZFA:0005327] |