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Belly buttons, or navels, are formed as a result of the umbilical cord's detachment after birth. The umbilical cord connects the developing fetus to the placenta, allowing the transfer of nutrients and oxygen. After birth, the cord is clamped and cut, leaving a small stump that eventually dries up and falls off, creating the belly button. The shape and appearance of the navel can vary from person to person due to differences in healing and genetic factors.

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1w ago

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