The Spleen: A Vital Organ You Need to Understand Now

5. White Pulp

The remaining 25 percent of the spleen is white pulp, which consists of lymphatic tissue. Unlike the red pulp, the white pulp doesn’t contain a variety of cells. Instead, the white pulp contains areas that create antibodies and harbor T cells and macrophages. A T cell is a lymphocyte, a specific type of white blood cell that assists with the innate immune system. The macrophages of the white pulp are more of a mystery to researchers. Experts do not know much about their origin or lifespan, though they exist in all of the secondary lymphoid organs.

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