Question: what are the four stages involved in phagocytosis?
Answer: Step 1: Activation of the Phagocyte. ... 
Step 2: Chemotaxis of Phagocytes (for wandering macrophages, neutrophils, and eosinophils) ... 
Step 3: Attachment of the Phagocyte to the Microbe or Cell. ... 
Step 4: Ingestion of the Microbe or Cell by the Phagocyte.