<prompt> Posterior surface of hea is formed by -RALALVRV  <response>: Ans. is ba i.e., LARA Surfaces of the hea Anterior sternocostal surface :- Formed mostly by right ventricle major and right auricle and paly by left ventricle and left auricle. Inferior diaphragmatic surface :- It is formed by left ventricle left 23 and right ventricle right 13. It is traversed by posterior interventricular groove PIV containing PIV branch of RCA. Base posterior surface :- Formed mainly by left atrium and paly by right atrium. It is separated from T5 to T, veebrae by pericardium, oblique pericardial sinus, esophagus and descending thoracic aoa. Right surface :- Mainly by right atrium. Left surface :- Mainly by left ventricle and paly by left auricle. 