Interventricular septum

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Interventricular septum
Section of the heart showing the ventricular septum.
Interior dorsal half of heart of nearly 5 weeks old human embryo. (Labeled as 'septum inferius')
Details
Part of	Heart
Artery	anterior interventricular branch of left coronary artery and Posterior interventricular artery
Identifiers
Latin	septum interventriculare cordis
MeSH	D054088
TA98	A12.1.00.013
TA2	3970
FMA	7133
Anatomical terminology [edit on Wikidata]

The interventricular septum (IVS, or ventricular septum, or during development septum inferius) is the stout wall separating the ventricles, the lower chambers of the heart, from one another.

The interventricular septum is directed obliquely backward to the right and curved with the convexity toward the right ventricle; its margins correspond with the anterior and posterior interventricular sulci. The lower part of the septum, which is the major part, is thick and muscular, and its much smaller upper part is thin and membraneous.^[1]

During each cardiac cycle the interventricular septum contracts by shortening longitudinally and becoming thicker.