Ventral view of the complete model Dorsal view of the complete model Right view of the complete model Left view of the complete model Cranial view of the complete model Cranial view of the aortic arches Caudal cutaway view of the atria; the mesenchymal cap surrounding the edges of the developing interatrial septum is clearly visible Caudal cutaway view of the atria and the entering veins; on the left an incomplete septum can be seen, possibly the venous valve of the superior cardinal vein The pulmonary vein entering the left atrium, shown in dorsal view Cutaway view of parts of the ventricle and atria in which the AV-canal is visible The developing AV-valves in the same orientation as the previous figure Overview of all cushion tissue lining the heart Anterior view of distal cushions in the outflow tract, shown together with section image Orientation of the section image from the previous figure, shown in the complete model Schematic drawings of transverse sections through the adult heart, starting near the apex, A, and progressing in the cranial direction up to the atrioventricular canal, D (based on White, 1968) Cutaway view of the vetricle near the apex; the different cava and septa are visible Cutaway view of the ventricle; the plane of section is more cranial than in the previous figure Cutaway view of the ventricle near the cranial end of the ventricle