Lymphatic System Structure Function Facts Britannica
The lymphatic system functions to drain tissue fluid, plasma proteins and other cellular debris back into the bloodstream and is also involved in immune defence Once this collection of substances enters the lymphatic vessels it is known as lymph It is subsequently filtered by lymph nodes, from which it returns to the circulation via the venous system The lymphatic system primarily consists of lymphatic vessels, which are similar to the veins and capillaries of the body's circulatory system They are located deep inside the body, such as around the lungs and heart, or closer to the surface, such as under the arms or groin The lymph nodes are found from the head to around the knee area
