What fluid nourishes the skin?

The fluid that nourishes the skin is lymph. Lymph is a clear fluid that circulates throughout the lymphatic system, which is a crucial part of the immune system. It primarily contains lymphocytes, proteins, and waste products. The lymph fluid helps to transport nutrients, oxygen, and waste products between the blood and the skin cells. This process is essential for maintaining skin health and promoting healing.

While blood is also an important fluid for nutrient delivery to the skin, it is the lymphatic system that plays a significant role in the drainage of toxins and waste from the skin. Plasma, which is the liquid component of blood, carries red blood cells, white blood cells, and platelets, but it is not the primary fluid responsible for direct nourishment of the skin. Serum is derived from blood plasma and does not contain clotting factors; it is used primarily for diagnostic purposes, rather than for nourishing the skin.