Umbilicus

Description

Centered on the anterior abdominal wall, the umbilicus (navel) sits on the linea alba between the paired rectus abdominis muscles, typically near the L3 to L4 vertebral level in the standing adult. Subcutaneous tissue and skin fold into the umbilical depression, where the fibrous umbilical ring anchors to the underlying anterior rectus sheath. Superiorly, the epigastric region transitions toward the costal margin and xiphoid process, while inferiorly the midline continues toward the suprapubic region and pubic symphysis. Clear midline anatomy. For teaching surface anatomy, the umbilicus is more than a landmark, it marks the former fetal conduit for the umbilical vein and arteries and a natural point of fascial weakness at the umbilical ring. Umbilical hernia often presents as a reducible bulge at or adjacent to the navel, and this view helps differentiate a true midline defect from paraumbilical protrusion related to linea alba diastasis. Surgeons also reference this region when planning laparoscopic port placement, balancing access with the risk of bleeding from periumbilical perforators and considering prior scars, piercings, or keloid tendency. Use this asset in gross anatomy and physical diagnosis coursework when you need a clean anterior reference for abdominal quadrants, dermal landmarks, and normal variation in umbilical contour across patients. It also fits well in patient education for umbilical hernia repair, postoperative scar counseling, and dermatologic discussion of periumbilical lesions such as omphalitis or umbilical endometriosis. Anatomical accuracy verified by SciePro's Medical Advisory Board.