urogenital triangle urogenital triangle the urogenital triangle is the anterior part of the perineum. in female mammals, it contains the vagina and associated parts of the internal genitalia. urogenital trianglemuscles of the female perineum. (urogenital triangle is roughly equal to top half of diagram.)muscles of male perineum. (urogenital triangle is roughly equal to top half of diagram.)detailsidentifierslatinregio urogenitalista98a01.2.06.003ta2279fma20348anatomical terminology structure the urogenital triangle is the area bound by a triangle with one vertex at the pubic symphysis and the two other vertices at the iliac tuberosities of the pelvic bone. components as might be expected, the contents of the urogenital triangle differ greatly between the male and the female. some of the components include: posterior scrotal nerves / posterior labial nerves urethra vagina bulbourethral gland / bartholin's gland muscles superficial transverse perineal muscle ischiocavernosus muscle bulbospongiosus muscle crus penis / clitoral crura bulb of penis / vestibular bulb urogenital diaphragm muscular perineal body superficial and deep perineal pouch blood vessels and lymphatics additional images articulations of pelvis. anterior view. the superficial branches of the internal pudendal artery. the posterior aspect of the rectum exposed by removing the lower part of the sacrum and the coccyx.