[概述]4.2.5 Veins 静脉

Rectal venous plexus直肠静脉丛Drains into : superior , middle & amp .Notes : site of portal-systemic anastomosis ( Latin , plexus = a braid , a network of nerves , blood vessels , or lymphatic vessels ) .Internal pudendal vein阴部内静脉Tributaries : deep vein o ......