What is the septum of the heart?
The wall between the heart chambers is called the septum of the heart. Gray's Anatomy (1918) describes it as a muscular wall that divides the heart into left and right sides.
What it is
- A muscular wall that divides the heart into left and right sides.
- Has an upper part (interatrial septum) between the atria and a lower part (interventricular septum) between the ventricles.
- Prevents mixing of oxygenated and deoxygenated blood.
Where it is
- In the middle of the heart.
- Runs from the base of the heart to the apex.
- The interventricular part is much thicker than the interatrial part.
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Last verified: 2026-07-18
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