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The umbilicus, also called the navel, is essentially a scar representing the former attachment of the umbilical cord in the fetus. The colloquial term for navel is belly button. It can form a depression, a type of umbilicus commonly referred to as an innie, or a protrusion, referred to as an outie. The underlying abdominal muscle layer also presents a concavity; its thinness at this point contributes to a relative structural weakness that makes it susceptible to hernia.

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Battle Creek, Michigan

... mi²). 110.9 km² (42.8 mi²) of it is land and 2.2 km² (0.8 mi²) of it is water. The total area is 1.92% water. Demographics As of the census2 ...

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