Final answer:
The spleen's white pulp contains lymphocytes, which are a type of white blood cell involved in the adaptive immune response.
Step-by-step explanation:
The white pulp of the spleen is primarily associated with the immune functions of the spleen and contains a high concentration of lymphocytes. These lymphocytes, which are a type of white blood cell, play a key role in the adaptive immune response by removing antigen-coated bacteria from the blood. Therefore, the components located in the spleen's white pulp are white blood cells and specifically lymphocytes.