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Review the location and borders of the superficial inguinal ring ( see Laboratory Thirty-five). Now study the course of the inguinal canal . The inguinal canal is a cylindrical shaped space that passes obliquely through the lowermost portion of the abdominal wall [probe inside the inguinal canal]. The inguinal canal has two openings, which were previously dissected, the superficial inguinal ring on the anterior end and the deep inguinal ring on its posterior end. Identify the four walls of the inguinal canal. The anterior wall of the inguinal canal is formed by the aponeurosis of the external abdominal oblique muscle. The lateral one-third of this wall is formed also by the internal abdominal oblique muscle (Figure 36.1). In this wall, the superficial inguinal ring marks the entrance to the inguinal canal . The inferior wall or the floor of the inguinal canal is formed by the inguinal ligament.
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