This book will be a comprehensive study of the lymphatic system and its immunological role. It will begin with lymphatic capillaries, their origin and development. It will treat lymph circulation, in general, with a special emphasis on lymph circulation in parenchymal organs. The next section will address lymph nodes, subcortical circulation and the conduit system. It will discuss organs with no lymphatic system, such as the brain. Finally, it will cover lymph composition and cells in the lymph. While primarily basic research, the volume will touch upon elements of the clinical, as well, broadening its scope and appeal.​