Preferred Label : atrial septum primum;
Uberon definition : In the developing heart, the cavity of the primitive atrium becomes subdivided into
right and left chambers by a septum, the septum primum, which grows downward into
the cavity. The increasingly smaller gap below it (before it fuses with the endocardial
cushion) is known as the ostium primum. The septum primum eventually fuses with the
endocardial cushion, closing the ostium primum off completely. Meanwhile, perforations
appear in the superior part of the septum primum, forming the ostium secundum. This
will eventually form part of the fossa ovalis.;
Uberon synonym : interatrial septum primum; septum primum;
Uberon Homology note : The tetrapod clade develops a complete atrial septum and loses the fifth aortic arch
altogether.[well established][VHOG];
Origin ID : 0004154;
UMLS CUI : C0225837;
Automatic exact mappings (from CISMeF team)
- Semantic type(s)
- UMLS correspondences (same concept)
- Uberon cross reference
- has part
In the developing heart, the cavity of the primitive atrium becomes subdivided into
right and left chambers by a septum, the septum primum, which grows downward into
the cavity. The increasingly smaller gap below it (before it fuses with the endocardial
cushion) is known as the ostium primum. The septum primum eventually fuses with the
endocardial cushion, closing the ostium primum off completely. Meanwhile, perforations
appear in the superior part of the septum primum, forming the ostium secundum. This
will eventually form part of the fossa ovalis.
