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Navel anatomy. Macro photograph of a transverse section through the abdomen of an adult, at the level of the naval. The front of the body is at top. Muscle is red, connective tissue is white and skin is brown. The muscles seen here are the rectus abdominis muscles, a pair of muscles that run vertically along either side of the abdomen. The muscles are connected by a band of fibrous tissue (orange, bottom centre), the linea alba.
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