内阴动脉(Arteria pudenda interna)源自于内髂动脉(英语:internal iliac artery),为三条阴部动脉(英语:pudendal arteries)的其中一条。内阴动脉负责供养外生殖器的血流。
内阴动脉为内髂动脉(英语:internal iliac artery)前分支的终末分支,在雌性个体身上较雄性细小。
内阴动脉源自于内髂动脉,并爬经骨盆侧壁。并于坐骨大孔(英语:greater sciatic foramen)的梨形肌(英语:piriformis muscle)下方离开骨盆腔,进入臀部。之后沿着荐棘韧带(英语:sacrospinous ligament),穿过坐骨小孔(英语:lesser sciatic foramen)进入会阴。后与内阴静脉(英语:internal pudendal veins)及阴部神经在会阴管(英语:pudendal canal)中并行。
内阴动脉拥有以下分支:
Right hip bone. Internal surface.
Dissection of side wall of pelvis showing sacral and pudendal plexuses.
The deeper branches of the internal pudendal artery.
Diagram of the arteries of the penis.
The penis in transverse section, showing the bloodvessels.
Internal pudental artery.Deep dissection. Lateral view.