Term: heart tube anatomical region
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]