Septum intermedium

Septum intermedium
Interior of dorsal half of heart of human embryo of about thirty-five days.
Same heart as in Fig. 467, opened on right side.
Details
Days	35
*Anatomical terminology* [edit on Wikidata]

Endocardial cushions project into the atrial canal, and, meeting in the middle line, unite to form the septum intermedium which divides the canal into two channels, the future right and left atrioventricular orifices.

References

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

External links

Overview at edu.mt

Development of the circulatory system

Heart

Tubular heart	Truncus arteriosus Bulbus cordis Primitive ventricle Primitive atrium Sinus venosus

Septa	Atrioventricular cushions/Septum intermedium Primary interatrial foramen Septum primum Foramen secundum Septum secundum Foramen ovale Aorticopulmonary septum

Other	Atrioventricular canal Primary interventricular foramen Protein signalling in heart development

Vessels

Arteries	Dorsal aorta Aortic arches Aortic sac

Veins	Anterior cardinal vein Posterior cardinal vein Common cardinal veins

Lymph vessels	Lymph sacs

Extraembryonic
hemangiogenesis

Fetal circulation

umbilical cord: Umbilical vein → Ductus venosus → Inferior vena cava → Heart → Pulmonary artery → Ductus arteriosus → Aorta → Umbilical artery

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