A site for medical students - Practical,Theory,Osce Notes

Separation of the Atria from the Venticles in the embryo

Endocardial Cushions separate the atria from ventricle
They form initial division between atria and ventricles
This is formed  on the dorsal and ventral wall of atrioventricular canals
Endocardial cushion grow into canal  to meet and fuse to separate atrioventricular canal into right and left  heart channels

The anterior and posterior cushions fuse but the lateral cushions remain unfused