1. Heart Fields UNSW Embryology Epiblast bilaminar embryo (day 15, dorsal surface)

6. Prechordal Plate Primitive Streak Primitive Node Cloacal Membrane

9. Location of cardiogenic cells in the epiblast prior to gastrulation { Cardiogenic precursors

10. Location of cardiogenic cells in the epiblast prior to gastrulation { Cardiogenic precursors Truncus Arteriosus Bulbus Cordis

11. { Cardiogenic precursors Truncus Arteriosus Bulbus Cordis Right Ventricle Left Ventricle Location of cardiogenic cells in the epiblast prior to gastrulation

12. { Cardiogenic precursors Truncus Arteriosus Bulbus Cordis Right Ventricle Left Ventricle AV Canal Atria Location of cardiogenic cells in the epiblast prior to gastrulation

13. Cells migrate through the primitive streak to form the underlying intraembryonic mesoderm

19. Mesoderm Trilaminar embryo

20. Mesoderm containing cardiogenic precursors

26. Truncus Arteriosus Bulbus Cordis Right Ventricle Left Ventricle AV Canal Atria Migration from the primitive streak results in the bilateral cardiogenic fields