part of part of heart apex of heart SCTID:362009004 heart apex cardiac apex The apex of the heart is the lowest superficial part of the heart. It is directed downward, forward, and to the left, and is overlapped by the left lung and pleura. [WP,unvetted]. FMA:7164 MA:0000488 UBERON:0002098 NCIT:C32126 Wikipedia:Apex_of_the_heart anatomical point