Lymph

Lymph: Part of the immune system is the lymphatic system which is made up of a network of conduits that carry a clear fluid called lymph. The conduits, also known as lymphatic vessels, compose a one-way system in which lymph flows only toward the heart. Lymphoid tissue is found in many organs, particularly the lymph nodes, and in the lymphoid follicles associated with the digestive system such as the tonsils.