Lymph is located throughout the lymphatic system, which includes lymphatic vessels, lymph nodes, and other lymphoid organs such as the spleen and thymus gland. Lymphatic vessels and lymph nodes are found throughout the body, including in the skin, mucous membranes, digestive system, respiratory system, and reproductive system. The lymphatic system is interconnected with the circulatory system, and lymphatic vessels often follow the path of blood vessels.