hematopoietic system AE macrophage activation AE 10050206 This is an AE which is a type of white blood cell of the immune system that engulfs and digests anything that does not have, on its surface, proteins that are specific to healthy body cells and is active. QY, JX, HY 巨噬细胞活化 http://en.volupedia.org/wiki/Macrophage#Types