Navel Navel The navel (clinically known as the umbilicus, colloquially known as the belly button, or tummy button) is a protruding, flat, or hollowed area on the abdomen at the attachment site of the umbilical cord. All placental mammals have a navel. The umbilicus is used to visually separate the abdomen into quadrants. The umbilicus is a prominent scar on the abdomen, with its position being relatively consistent among humans. The skin around the waist at the level of the umbilicus is supplied by the tenth thoracic spinal nerve (T10 dermatome). The umbilicus itself typically lies at a vertical level corresponding
Navel piercing in diameter for the upper and 8mm in diameter for the lower. Although navel bananabells are different from full rings, such as captive bead rings (CBRs), which can also be worn in navel piercings, internet body jewelry retailers and wholesalers tend to refer to these barbells as belly button "rings". A new version of navel jewelry is on the market for those without pierced navels, which is based on the idea of clip-on earrings. Although navel piercings are fashion symbols and may make the navel and midriff look more sexually attractive, they carry the many risks of body piercing, notably: