![]() finally, the liver is also a site of antigen presentation and contains its own cohort of phagocytes and lymphocytes.It also stores red blood cells and immature monocytes. ![]() It is part of the reticulo-endothelial system which filters blood and removes old cells, tissue debris, pathogens and immune complexes. the spleen is basically a massive lymph node and is, therefore, another site of antigen presentation to mature lymphocytes.Lymph is then returned to the systemic circulation via the thoracic duct, which joins with the left subclavian vein. These filter lymph and provide a site for antigen presentation to the adaptive immune system. mature lymphocytes migrate to lymph nodes, which are small bean-like structures situated along the lymphatic vasculature throughout the body. ![]() It is where lymphocytes mature and receive their immunological “education” before being released into the bloodstream. It is active throughout life, but is at its largest in childhood and decreases in size after puberty.
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