Human skin color is determined by the interaction of melanin, carotene and hemoglobin. Storage of water, fat, glucose and vitamin D is also a function of the integumentary system, according to the AAD.
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On November 25, 2002, President Bush signed into law the Homeland Security Act of 2002 (HS Act) (Public Law 107â296) and announced that former Pennsylvania Governor Tom Ridge would become secretary of a new DHS to be created through this legislation.