What circulates through the body to assist in nourishing the skin?

Blood and lymph play a crucial role in nourishing the skin. Blood provides essential nutrients and oxygen to the skin cells through a complex network of blood vessels. This supply is vital for maintaining healthy skin, as it enables cell reproduction and the healing of wounds. Blood also helps remove metabolic waste products from the skin.

Lymph, on the other hand, is part of the lymphatic system, which helps remove toxins and waste from the tissues and assists in the immune response. By circulating through the body, lymph aids in maintaining fluid balance and providing immune defense, which is essential for skin health and overall wellness.

Oxygen is indeed important for skin health, but it is primarily delivered through the blood rather than circulating on its own. Carbon dioxide, while a waste product, does not support nutrition and would not be beneficial for skin nourishment. Serum, which contains various components including antibodies, may support certain functions but is not the primary fluid that circulates throughout the body to nourish the skin. Thus, blood and lymph together represent the primary circulatory sources that nourish and support the skin effectively.