Overview Inguinal rings internal (deep) inguinal ring lies in transversalis fascia, just lateral to the inferior epigastric vessels external (superficial) ring is a triangular opening in the external oblique aponeurosis that lies just lateral to the pubic tubercle Inguinal canal boundaries anterior wall formed by the aponeuroses of external oblique and internal oblique muscles posterior wall formed by the aponeurosis of transversus abdominis muscle and transversalis fascia superior wall roof formed by the arching fibers of the internal oblique and transversus abdominis muscles inferior wall floor formed by the inguinal ligament and lacunar ligament contents male inguinal canal transmits spermatic cord spermatic cord contents = "FANO x 3" Fascia internal spermatic fascia cremasteric fascia contains cremaster muscle external spermatic fascia Arteries testicular artery artery to vas deferens artery to cremaster Nerves ilioinguinal nerve genital branch of genitofemoral nerve innervates cremaster muscle autonomics Other vas deferens pampiniform plexus of veins testicular lymphatics female inguinal canal transmits round ligament of uterus ilioinguinal nerve does not pass through deep inguinal ring - only travels through part of the inguinal canal