| 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: | extracellular matrix | 
|---|---|
| Synonyms: | matrisome, proteinaceous extracellular matrix | 
| Definition: | A structure lying external to one or more cells, which provides structural support, biochemical or biomechanical cues for cells or tissues. | 
| Ontology: | GO: Cellular Component [GO:0031012] QuickGO AmiGO |