材料 :成年男尸 ,约 50岁 ,身高 1 6.8ｃｍ。左侧双输尿管 ,分为内外两根。内侧根起于肾门上方 ,经腰方肌、腰大肌前面下行越过髂总动脉分叉处入盆腔 ,走行于闭孔动、静脉的前面 ,全长 2 5ｃｍ ,上段压扁外径0 .6ｃｍ ,中段 0 .8ｃｍ ,下段 0 .5ｃｍ。外侧根起于肾门下方 ,经腰 Material: adult male body, about 50 years old, height 1 6.8cm. Left ureter, divided into two inside and outside. The medial root starts above the renal hilum and passes the anterior lumbar muscle and the anterior psoas muscle past the common iliac artery bifurcation into the pelvis and runs in front of the closed orbital artery and vein with a total length of 25 cm. 6cm, the middle of 0 .8cm, the next paragraph 0 .5cm. Outside the root of the kidney from the bottom of the door, the waist