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Other Terms: Canalis inguinalis, Canal inguinal
The inguinal canal contains the spermatic cord and the ilioinguinal nerve in the male, and the round ligament of the uterus and the ilioinguinal nerve in the female. It is an oblique canal about 4 cm. long, slanting downward and medialward, and placed parallel with and a little above the inguinal ligament; it extends from the deep inguinal ring laterally to the superficial inguinal ring medially. It is bounded, in front, by the integument and investing fascia, by the aponeurosis of the external oblique throughout its whole length, and by the internal oblique in its lateral third. Its posterior wall is the reflected inguinal ligament, the falx inguinalis, the transversalis fascia, the extraperitoneal connective tissue, and the peritoneum. The arched fibers of internal oblique and transversus abdominis muscles form the roof of the canal. The floor of the canal is formed by the union of the transversalis fascia with the inguinal ligament, and at its medial end by the lacunar ligament.