| Latin = umbilicus | GraySubject = | GrayPage = | Image = Femnavel.jpg | Caption = Human navel | Image2 = | Caption2 = | Precursor = | System = | Artery = | Vein = | Nerve = | Lymph = | MeshName = | MeshNumber = | DorlandsPre = u_02 | DorlandsSuf = 12836058 | }} Distinguish from naval (i.e., relating to a navy). The navel or belly button (also called an umbilicus or, colloquially, tummy button) is a scar on the abdomen, caused when the umbilical cord is removed from a newborn baby. All placental mammals have a navel. While it is fairly conspicuous in humans, in most mammals it appears only as a thin hairless line. In humans, the scar can appear as a depression (often referred to as an innie) or as a protrusion (outie). Although th

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