Beginning with an exploration of the chemicals and cells of the lymphatic system, this volume of the "Encyclopedia of the Human Body" discusses the various components of the lymphatic system and how they work together to initiate the immune response, act as a secondary circulatory system, and transport select nutrients from the digestive system to the circulatory system. The lymph system, including lymph nodes and lymphatic circulation are explored and lymphatic functions of the spleen, appendix, and tonsils are discussed. The history of the research on the lymphatic system is presented and the future of research in this field is considered. Current controversies and dilemmas of scientists performing this research are explored. Lymphatic system disorders and diseases, and their symptoms and treatments are explored, including leukemia, AIDS, anemia, chronic fatigue syndrome, strep infections, asthma, and allergies. This reference concludes with information about maintaining a healthy lymphatic system, a comprehensive glossary, and resources for further information including web sites and contact information for organizations and national health institutions. The "Encyclopedia of the Human Body" provides a complete, comprehensive reference source for students interested in the human body. Each book in this ten-volume series introduces and describes a specific body system, including the parts and function of each system, the history of discovery, related diseases and treatments, as well as future advances in research. Detailed illustrations and diagrams, including an eight-page color insert, provide a visual reference for written material.