| Name: | presumptive sinus venosus | 
|---|---|
| Synonyms: | |
| Definition: | Portion of tissue that is part of the heart tube and will become the sinus venosus. | 
| Ontology: | Anatomy Ontology [ZFA:0001722] | 
| Name: | cardiac muscle cell | 
|---|---|
| Synonyms: | cardiac muscle cells, cardiac myocyte, cardiomyocyte | 
| Definition: | |
| Ontology: | Anatomy Ontology [ZFA:0009316] |