| Name: | heart tube | 
|---|---|
| Synonyms: | |
| Definition: | Cavitated compound organ that will become the adult heart following looping morphogenesis and valve formation. | 
| Ontology: | Anatomy Ontology [ZFA:0000360] | 
| Name: | anatomical region | 
|---|---|
| Synonyms: | |
| Definition: | A 3D region in space without well-defined compartmental boundaries; for example, the dorsal region of an ectoderm. | 
| Ontology: | Spatial Ontology [BSPO:0000070] |