Septum spurium

During development of the heart, the orifice of the sinus venosus lies obliquely, and is guarded by two valves, the right and left venous valves; above the opening these unite with each other and are continuous with a fold named the septum spurium.

Septum spurium
Interior of dorsal half of heart from a human embryo of about thirty days. (Septum spurium labeled at upper left.)
Interior of dorsal half of heart of human embryo of about thirty-five days. (Septum spurium labeled at upper left.)
Anatomical terminology [edit on Wikidata]

References

This article incorporates text in the public domain from page 510 of the 20th edition of Gray's Anatomy (1918)