Lymph Say: limf Lymph is a clear fluid that flows through its own vessels located throughout the body. Lymph contains white blood cells, which are the germ fighters of the immune system. Back to Articles Related Articles Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor. © 1995-2021 KidsHealth®. All rights reserved. Images provided by The Nemours Foundation, iStock, Getty Images, Veer, Shutterstock, and Clipart.com.