Describe phagocytosis. what white blood cell is actively engaged in it

The ingestion of bacteria, dead cell materials or particles by cells it is the major function of macrophages the pathogen interacts with phagocyte receptors phagocyte envelops pathogen and activates lysozyme pathogen is digested and broken down into proteins complex formed including pathogen DNA to form a major histocompatability complex (MHC) -antigen (adaptive immunity