The two hypogastric nerves ramify over the first segment of the sacrum to form the hypogastric plexus. The plexus splits into two halves which flank the rectum, each half being termed a pelvic plexus,
From the pelvic plexuses filaments accompany branches of the internal iliac (hypogastric) artery to supply the pelvic viscera.
(a) Hemorrhoidal plexus, is distributed to the rectum.
(b) Vesical plexus, innervates the lower part of the ureter, the bladder, seminal vesicles, and vasa deferentia (deferent ducts).
(c) Prostatic plexus, to the prostate, neck of the bladder, urethra, and penis. (d) Utero-vaginal plexus, in females only. It corresponds to the prostatic plexus in males. It supplies the uterus, vagina, urethra, and clitoris.
Plate XII. Cutaneous Areas Of Lower Extremities