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Navel - Wikipedia
Umbilicus: Anatomy and function | Kenhub
Umbilicus Definition & Meaning - Merriam-Webster
Disorders of the Umbilicus: Practice Essentials, Anatomy ... - Medscape
I’ve always wondered: what’s behind the belly button?
Care of the umbilicus and management of umbilical disorders
Navel | anatomy | Britannica
Anatomy and Physiology of the Umbilicus | SpringerLink
UMBILICUS Definition & Meaning | Dictionary.com
Anatomy, Abdomen and Pelvis: Umbilical Cord - StatPearls - NCBI Bookshelf