Light micrograph (LM) of the spleen, showing reticulate architecture of capsule and trabeculae, which provide a framework for a reticulin mesh throughout the red pulp and in the white pulp margins. The spleen is a large lymphatic organ, located in the upper abdomen, with several functions: removing debris from circulating blood, removing defective blood cells, and producing the immunological response to blood-borne antigens. Magnification unknown.