1) In the female, the inguinal canal transmits the round ligament of the uterus to the labia majora .
2) In the male , the vas deferens, accompanied by its artery and the testicular vessels, enters the deep ring.
As these structures pass along the inguinal canal, they receive a covering from every layer through which they pass.
3) The spermatic cord is the vas deferens and a vessel invested by all three layers, and is only complete when it exits from the superficial ring.
-> the layers = aponeuroses of external, internal obliques and transversus abdominis
4) The ilioinguinal nerve enters the canal laterally by passing between internal and external oblique.
It supplies the skin on the upper medial thigh, base of the penis, and the anterior scrotum or labia.