What is the Lymphatic System?

The lymphatic system is an extensive drainage network that helps keep bodily fluid levels in balance and defends the body against infections. It is made up of a complex network of lymph capillaries, lymph nodes, lymph ducts, lymph organs, and a network of lymphatic vessels that carry lymph and other substances throughout the body. You have lymphatic vessels all around your body. Lymph nodes tend to cluster in certain places such as on the side of your neck, under your arms, or in your groin.