Term: endocardium apical surface
Name: endocardium
Synonyms:
Definition: Layer that lines the lumen of the heart.
Ontology: Anatomy Ontology [ZFA:0001320]

Name: apical surface
Synonyms:
Definition: Anatomical surface that is located on the apical side of the body or body part.
Ontology: Spatial Ontology [BSPO:0000373]