part of part of tributary of tributary of Homo sapiens system vein retromandibular vein maxillary vein http://upload.wikimedia.org/wikipedia/commons/8/8c/Gray557.png UBERON:0001660 Wikipedia:Maxillary_vein A vein that consists of a short trunk which accompanies the first part of the internal maxillary artery. It is formed by a confluence of the veins of the pterygoid plexus, and passes backward between the sphenomandibular ligament and the neck of the mandible, and unites with the superficial temporal vein to form the retromandibular vein. [WP,unvetted]. UMLS:C0226524 NCIT:C32855 MA:0002169 FMA:50941 in horses, a branch of the external jugular gives off the occipital and caudal auricular vein SCTID:29972009 EMAPA:37169