The portion of the body in the pelvis occupied by urogenital passages and the rectum, bounded in front by the pubic arch, in the back by the coccyx, and laterally by part of the hipbone.

• 会阴身体上有尿道和直肠口的盆骨里的一个部分，前邻阴道，后临尾骨，再后是臀骨的一部分