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CVS Embryology
Structures and their origins
| Question | Answer |
|---|---|
| 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 |