part of part of connected to connected to Homo sapiens system cavernous sinus ophthalmic vein inferior ophthalmic vein http://upload.wikimedia.org/wikipedia/commons/0/02/Gray572.png Wikipedia:Inferior_ophthalmic_vein inferior ophthalmic FMA:51247 The inferior ophthalmic vein begins in a venous net-work at the forepart of the floor and medial wall of the orbit; it receives some vorticose veins and other veins from the Rectus inferior, Obliquus inferior, lacrimal sac and eyelids, runs backward in the lower part of the orbit and divides into two branches. One of these passes through the inferior orbital fissure and joins the pterygoid venous plexus, while the other enters the cranium through the superior orbital fissure and ends in the cavernous sinus, either by a separate opening, or more frequently in common with the superior ophthalmic vein. SCTID:149986001 UBERON:0011193 inferior opthalmic vein