ANATOMY

Detailed explanation-1: -An important structure that separates the two ventricles is the interventricular septum. Anatomically it is divided into two parts: a thick, muscular part and a relatively thin membranous part. The muscular part of the interventricular septum separates most of the left and right ventricles from each other.

Detailed explanation-2: -There are two branches of the bundle of His: the left bundle branch and the right bundle branch, both of which are located along the interventricular septum. The left bundle branch further divides into the left anterior fascicle and the left posterior fascicle.

Detailed explanation-3: -The interventricular septum separates the ventricles and allows for proper blood flow through the heart: from the right atrium through the tricuspid valve to the right ventricle to the lungs, back to the left atrium, followed by the left ventricle through the mitral valve.

Detailed explanation-4: -The bundle of His is located just below the membranous septum at the crest of the interventricular septum (27). The unbranched portion of the bundle of His extends 2 to 3 millimeters before penetrating the central fibrous body for a length of 0.25 to 0.75 millimeters.

Detailed explanation-5: -A wall of muscle called the septum separates the left and right atria and the left and right ventricles. These are referred to as the atrial and ventricular septum.