Uterine artery from the internal iliac artery

Ovarian artery from the abdominal aorta. The two anastomose at the mesosalpinx (see below). The Uterine artery have a unique away of supplying the whole of the uterus. Firstly they divide into anterior and posterior arcuate arteries at the uterine walls. Then they pass transversely across the uterine tissue anastomosing with each other (left and right vessels). They provide radial branches which pass into the myometrial layers and then give the spiral or helicine arterioles, which supply the endometrium. These helicine arterioles are important in the process of menstruation.

Uterine veins drain into the internal iliac vein.

Ovarian veins drain into the inferior vena cava on the right) and left renal vein on the left. The two veins anastomose at the mesosalpinx. There is a longitudinal anastomoses from the ovarian veins or ovarian artery superiorly at the level of the ovary to the azygos artery or vein of the vagina below, which is a tributary (or branch) of internal pudendal vein. The vessels, which take part in this anastomoses are as follows

	Uterine veins
	Ovarian veins
	Vaginal veins
	Middle rectal veins
	Azygos veins of the vagina

Branches of the inferior hypogastric plexus

Motor fibers are poorly understood. Vasoconstrictor nerves are sympathetic and probably motor to uterine musculature.

Sensory fibers are from the paraysympathetic and sympathetic systems.