| Name: | extension | 
|---|---|
| Synonyms: | yolk extension | 
| Definition: | The posterior elongated region of the yolk cell that forms during the segmentation period. | 
| Ontology: | Anatomy Ontology [ZFA:0000106] | 
| Name: | anterior region | 
|---|---|
| Synonyms: | |
| Definition: | Anatomical region anteriorly located on the body or body part. | 
| Ontology: | Spatial Ontology [BSPO:0000071] |