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CVS Embryology

Structures and their origins

Rough walled part of right atrium and its auricle Primitive atrium
Bulboventricular chamber Primitive ventricle
Infundibulum of the right ventricle Mid Bulbus cordis (conus)
Aortic vestibule of the left ventricle Mid Bulbus cordis (conus)
Smooth part of right atrium Right horn of sinus venosus
Trabeculated part of left ventricle Primitive ventricle
Ascending aorta Truncus arteriosus
Trabeculated part of right ventricle Proximal Bulbus cordis
Septum intermedium AV/endocardial cushions
Left auricle Primitive atrium
Pulmonary trunk Truncus arteriosus
Left atrium absorption of pulmonary veins
U-shaped bulboventricular loop Bulbus cordis and primitve ventricle
S-shaped bulboventricular loop freeing of primitive atrium and sinus venosus freed from septum transversum
Pulmonary and aortic valve Distal bulbus cordis
Left braciocephalic vein Anterior cardinal veins
Portal vein Caudal vitelline veins
IVC Cephalic right vitelline vein
Right and left venous valves Entrance of right horn of sinus venosus/Sinoatrial orifice
Septum spurium Dorsocranial left and right venous valves
Valve of IVC Right venous valve
Valves of the coronary sinus and crista terminalis Right venous valve
Coronary sinus Left horn of the sinus venosus
Created by: Ulaisl



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