MEDICAL PHYSIOLOGY

Detailed explanation-1: -The apex (the most inferior, anterior, and lateral part as the heart lies in situ) is located on the midclavicular line, in the fifth intercostal space . It is formed by the left ventricle. The base of the heart, the posterior part, is formed by both atria, but mainly the left.

Detailed explanation-2: -In the anatomical position, the apex of the heart is the confluence of the inferior and left borders. It is a projection inferiorly, anteriorly and to the left of the left ventricle.

Detailed explanation-3: -In a pyramid or cone, the apex is the vertex at the “top” (opposite the base). In a pyramid, the vertex is the point that is part of all the lateral faces, or where all the lateral edges meet.