[Location] Localized in the supine position, on the anterior median line of the lower abdomen, 1.5 cun below the umbilicus. (Fig.74)
 
[Regional Anatomy] Skin→subcutaneous tissue→linea alba→transverse fascia→extraperitoneal fat tissue →parietal peritoneum. Superficial layer, the distribution of the anterior cutaneous branches of the prior branches of the eleventh thoracic nerve, and the venous network around the umbilicus; deep layer, the branch of the prior branches of the eleventh thoracic nerve.