22 輸尿管不由下列何動脈供應？

腎動脈 睪丸或卵巢動脈 腹腔動脈 外腸骨動脈

外腸骨動脈 that is external iliac artery

HELLLO!!!!!

thus

renal artery ! upper third

middle third:

testicular / ovarian artery

abdominal artery

lower third:

lower portion is supplied by the inferior vesical artery in the male and uterine artery in the female both of which originate from the internal iliac arteries.

The ureter derives its blood supply in a segmental fashion with a large degree of variability⁴. The upper part is supplied by the renal arteries with the middle portion supplied by branches from the aorta, gonadal, common iliac and internal iliac vessels. The lower portion is supplied by the inferior vesical artery in the male and uterine artery in the female both of which originate from the internal iliac arteries. It is therefore possible that a local disruption in blood supply may result in subsequent ischaemic stricture formation.