Term: endocardial precursor ventral side
Name: endocardial precursor
Synonyms:
Definition: Is a portion of tissue part of the heart primordium which will give rise to the endocardium.
Ontology: Anatomy Ontology [ZFA:0005489]

Name: ventral side
Synonyms: ventral
Definition: An anatomical region that is the entire part of an anatomical structure ventral to a horizontal plane and bounded on one side by the same horizontal plane.
Ontology: Spatial Ontology [BSPO:0000068]