The navel (clinically known as the umbilicus; : umbilici or umbilicuses; also 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.

Structure

The umbilicus is used to visually separate the abdomen into quadrants.

The umbilicus is a prominent scar on the abdomen, with its position

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