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
Lint (material) abdominal hair often seems to grow in concentric circles around the navel; the scaly structure of the hair enhances the abrasion of minuscule fibres from the shirt and directs the lint towards the belly button. Steinhauser established that shaving one's belly will result in a fluff-free navel but only until the hairs grow back. His other suggestions include wearing old clothes, which tend to shed less lint than newer garments, which can lose up to one-thousandth of their weight to the belly button over the course of a year. A body piercing can also be used, with belly button rings