| − | The '''epidermis''' is the outer layer of [[cell|cells]] designed to provide protection.<ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia Educational Ministries, Inc. 1998</ref> Also known as the top layer of [[skin]]. | + | The '''epidermis''' is the outer layer of [[cell|cells]] designed to provide protection.<ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia Educational Ministries, Inc. 1998</ref>, excrete waste and thermoregulate by sweating, retain water, and synthesize [[vitamin D]]. It is also known as the top layer of [[skin]]. |