Your spleen is an organ in your upper left abdomen, tucked under your rib cage. It's an important part of your lymphatic system and plays a role in immunity. Your spleen filters blood, removes old ...

It transfers fluids throughout the body through a system of lymphatic vessels, lymph nodes, and two collecting ducts [1]. The thymus, bone marrow, spleen, tonsils, and appendix are also a part of ...