Ans: A navel which is also known as the belly button in common language, is the spot where the umbilical cord used to be attached from the mother to the developing fetus. This cord is the main passageway that carries vitamins and nutrients from the mother to the developing child. Once the child is born, the umbilical cord is cut and the scar remains. Hence, because of this, the navel is also known as an umbilical scar.