Term: endocardial precursor anatomical 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: anatomical side
Synonyms:
Definition: An anatomical region bounded by a plane perpendicular to an axis through the middle.
Ontology: Spatial Ontology [BSPO:0000054]