Term: presumptive atrium primitive heart tube cardiac muscle myoblast
Name: presumptive atrium primitive heart tube
Synonyms:
Definition: Multi-tissue structure that is part of the primitive heart tube and will become the cardiac atrium.
Ontology: Anatomy Ontology [ZFA:0001721]

Name: cardiac muscle myoblast
Synonyms: cardioblast
Definition: A precursor cell destined to differentiate into cardiac myocytes.
Ontology: Anatomy Ontology [ZFA:0009234]