NIH MeSH · D054087Anatomy
Atrial Septum
Also known asSeptum, Atrial
Definition
The thin membrane-like muscular structure separating the right and the left upper chambers (HEART ATRIA) of a heart.
MeSH classification
- A07.541.459.249
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What does Atrial Septum mean in medicine?
The thin membrane-like muscular structure separating the right and the left upper chambers (HEART ATRIA) of a heart. This definition is taken from the National Library of Medicine's MeSH (Medical Subject Headings) 2026 release, which is the standard vocabulary used to index PubMed and most medical literature.
Is Atrial Septum known by any other names?
Yes. Atrial Septum is also referred to as Septum, Atrial in different clinical, research and patient-facing contexts. The MeSH descriptor groups all of these synonyms under a single canonical concept so research and records stay consistent.
Where does Atrial Septum sit in the medical classification?
Atrial Septum falls under the broader medical category "Anatomy" in the MeSH hierarchy (tree numbers: A07.541.459.249). Browsing the related concepts on this page takes you to neighbouring topics in the same branch of medicine.
Where can I get a plain-language explanation of Atrial Septum?
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Source: NIH MeSH 2026 (D054087) — National Library of Medicine, public domain. View official MeSH record ↗