What is the main function of lymph vessels in the skin?

The primary role of lymph vessels in the skin is to maintain fluid balance and support the immune system. They achieve this by transporting lymph, a clear fluid that contains waste products, bacteria, and excess fluids away from the tissues. This function is crucial for preventing swelling and ensuring that any harmful substances present in the skin are filtered out through the lymph nodes, which aid in the immune response. While other choices describe important functions of the skin, such as nourishment and temperature regulation, they do not pertain to the specific role of lymph vessels.