RESUMO
The irrigation is generally similar to that found in the rat and the hamster. However, certain differences are found in the OF1 strain of mice. The relatively slender ovarian artery has a perpendicular anastomosis at the cranial extremity of the uterine artery giving rise to a more voluminous ovarian branch. The arterial anastomosis at the tubulo-uterine junction is very fine. The uterine artery always arises from the umbilical artery which in every case arose from the internal iliac artery. The uterine artery has a voluminous branch to the uterine body and the cervix but does not anastomose with the vaginal artery. The vaginal arteries are narrow and asymmetrical, the right branch always giving rise to a voluminous urethral branch. The arteries of the pelvic wall are characterised by the variability of their origin resulting from the asymmetric disposition of the internal and external iliac arteries. The venous system includes numerous anastomoses, cranial and caudal to the pubic symphysis. On the sides of the vagina, the vaginal veins form an anastomosic arcade.