FIG 2. Schematic drawing of the venous system connecting the facial vein and the cavernous sinus. Facial vein (thick arrow), angular vein (short thin arrow), SOV inferior root (double arrows), SOV superior root (long thin arrow).
FIG 2. Schematic drawing of the venous system connecting the facial vein and the cavernous sinus. Facial vein (thick arrow), angular vein (short thin arrow), SOV inferior root (double arrows), SOV superior root (long thin arrow).