Lymphatic System: Introduction : lymph, lymph vessels, lymph nodes, lymph organs (spleen, thyms gland), lymphoid tissue (tonsils), Bone marrow. Functions of lymphatic system: Drains interstitial fluid. Which absorbs tissue fluid and mixes it with the blood. Dietary lipids and fat soluble vitamins such as A,D,E,K are absorbed from the G.I. tract and mixed with the blood. Provides protection against invasion of microorganisms into the body. Some lymphocytes prevent the intrusion