<prompt> Which of the following is not a phagocytic cell -MacrophagesKupffler cellsNK cellsNeutrophils  <response>: Ans. is c i.e., NK cells Micro-organisms entering the tissue fluid or blood stream are very rapidly engulfed by the cells called phagocytes. Phagocytic cells are of two types:1 Mononuclear macrophages: Monocytes blood, histiocytes tissues, alveolar macrophages lung, kupffer cells liver, microglia brain, osteoclasts bone, and mesangial cells kidney.2 Polymorphonuclear microphages: Neutrophils. Basophils also belong to polymorphonuclear microphages but they are not phagocytes. Eosinophils have only a limited degree of phagocytic activity. 