And we have many of these lymph nodes along different regions of our body. Now, within these lymph nodes, we have cavities, we have sinuses. And within these cavities, we have specialized types of leukocides wide blood cells. Now, when dendritic cells found in the tissue pick up pathogenic antigens, they carry these pathogenic antigens into our lymph nodes. And inside the lymph nodes, we have plasma cells that produce antibodies against these antigens. And these antibodies basically leave the lymph nodes along the other side and eventually, they are dumped into our vein system.