Spleen Measuring about 12 cm (5 inches) in length, the spleen is the largest lymphatic organ. It is located on the left side of the body, inferior to the diaphragm and at the left edge of the stomach. Like other lymphatic organs, the spleen is surrounded by a capsule whose extensions into the spleen form trabeculae. The splenic artery, splenic vein, nerves, and efferent lymphatic vessels pass through the hilus of the spleen located on its slightly concave, upper surface. There are two distinct areas within the spleen: • White pulp consists of reticular fibers and lymphocytes in nodules that resemble the nodules of lymph nodes. • Red pulp consists of venous sinuses filled with blood. Splenic cords consisting of reticular connective tissue, macrophages, and lymphocytes form a mesh between the
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