Lymphatic System The Lymphatic System consists of a fluid called Lymph that flows in lymph vessels. Lymphatic tissue is a part of reticular connective tissue that contains a large number of lymphocytes. Lymph flows in lymph vessels and drains into lymph nodes and mixes with blood. Lymphatic System includes the following lymph, lymph vessels, lymph nodes, lymph organs (spleen, thyms gland), lymphoid tissue (tonsils), bone marrow. drains interstitial fluid. which