| 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: | integument |
|---|---|
| Synonyms: | skin |
| Definition: | The outer protective barrier that separates the animal from its aquatic environment. |
| Ontology: | Anatomy Ontology [ZFA:0000368] |