| Name: | shield |
|---|---|
| Synonyms: | dorsal organizer, organizer, Spemann Mangold organizer, Spemann's organizer |
| Definition: | Embryonic structure that is a local accumulation of cells along the germ ring. The shield marks the dorsal side of the embryo. |
| Ontology: | Anatomy Ontology [ZFA:0000071] |
| Name: | aplastic |
|---|---|
| Synonyms: | aplasia, undeveloped |
| Definition: | Absence of an organ, tissue or cell due to failure to develop from a primordium or precursor cell. |
| Ontology: | Phenotypic Quality Ontology [PATO:0001483] |