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1.6 The Inguinal Canal (ssss1 and ssss1)
ssss1 Ventral view of inguinal canal of the pig. The left side of the diagram shows the superimposition of the superficial inguinal ring almost directly upon the vaginal ring in this species.
ssss1 Lateral view of the inguinal canal of the horse. A window has been cut from the pelvic part of the tendon of the external abdominal oblique muscle immediately adjoining the superficial inguinal ring. This exposes that part of the internal oblique abdominal muscle which forms the medial (deep) wall of the inguinal canal.
The inguinal canal is a potential space extending between the superficial and deep inguinal rings. The canal does not have a surrounding wall. The external opening (superficial inguinal ring) is a slit in the aponeurosis thereby dividing it into two parts, an abdominal part (cranially) and a pelvic part (caudally).
Species variationspighorsepig
vaginal processgubernaculum
1.7 Hernias
A hernia occurs when an organ or mesentery pushes through an opening in the muscle or tissue that normally holds it in place. Hernias occur most commonly in the abdomen when there is a deficit or weakness in the abdominal wall, but they may also occur at the diaphragm or the perineum. The several sites where hernias may occur are as follows: