The lymphatic system is not a very well-known system. However, it is a system of organs and vessels just as complex as the circulatory system, and just as essential to the survival of the human body, because it makes up the majority of our body's immune system. The lymphatic system consists of a network of vessels and nodes, along with a few specialized organs. It is also closely interlinked with the circulatory system.
Lymph and Lymph Vessels