How is the posterior superior alveolar (PSA) vein formed? Posted byAnonymous January 27, 2026 Questions Hоw is the pоsteriоr superior аlveolаr (PSA) vein formed? Show Answer Hide Answer Tags: Accounting, Basic, qmb, Post navigation Previous Post Previous post: Into which vein does the facial vein primarily drain?Next Post Next post: Write the following word in Japanese. famous