| 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: | anterior region |
|---|---|
| Synonyms: | |
| Definition: | Anatomical region anteriorly located on the body or body part. |
| Ontology: | Spatial Ontology [BSPO:0000071] |