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]

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

References

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

Human embryogenesis in the first three weeks

Week 1

Week 2
(Bilaminar)

Week 3
(Trilaminar)

Germ layers	Archenteron/Primitive streak Primitive pit Primitive knot/Blastopore Primitive groove Gastrula Gastrulation Regional specification Embryonic disc

Ectoderm	Surface ectoderm Neuroectoderm Somatopleuric mesenchyme Neurulation Neural crest

Endoderm	Splanchnopleuric mesenchyme

Mesoderm	Axial mesoderm Paraxial Somite Somitomere Intermediate Lateral plate Intraembryonic coelom Splanchnopleuric mesenchyme Somatopleuric mesenchyme

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