With the sprouting of blood vessels, we can clearly recognize dark-stained blood vessels including axial vein, dorsal aorta, intersomitic vessels, caudal vein, and head vessels at prim-15 stage.

• 随着血管系统的发生，该基因在背动脉、轴静脉、体节间血管等血管系统出现广泛的高表达。