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Low magnification micrograph of a rat spleen stained with the histochemical technique for detection of acid phosphatase. With this technique, macrophages are stained brown. There is a high concentration of macrophages in the red pulp, whereas the are

Low magnification micrograph of a rat spleen stained with the histochemical technique for detection of acid phosphatase. With this technique, macrophages are stained brown. There is a high concentration of macrophages in the red pulp, whereas the are