What is NOT a function of the skin?

The role of producing blood cells is not a function of the skin. The skin primarily serves as a protective barrier, guards against pathogens, regulates body temperature through sweat glands and blood flow, and provides sensory perception with nerve endings that detect touch, temperature, and pain. Blood cell production occurs primarily in the bone marrow, which is part of the skeletal system, rather than in the skin. This distinction highlights the essential protective, regulatory, and sensory roles of the skin while clarifying that hematopoiesis, or blood cell formation, is not one of them.