Phagocytosis Figure (Figure 17.21). Reprinted from OpenStax Microbiology (p. 712), by N. Parker, M. Shneegurt, A.-h. Thi Tu, B. M. Forester, and P. Lister, 2016, Rice University. Copyright 2016 by Rice University.

Phagocytosis Figure

The membrane vesicle containing the pathogen after the phagocyte wraps around the pathogen and undergoes membrane invagination

Phagosome

A type of endocytosis in which molecules are enclosed by a vesicle and delivered to a phagocyte

(Photo credits in References)

University of Notre Dame

After pathogen recognition and binding, the pathogen is put into a vesicle and brought into a phagocyte (phagocytosis). After the phagocyte is engulfed, lysosomal enzymes digest the pathogen. Reactive oxygen species from respiratory bursts and reactive nitrogen compounds can also degrade pathogens. Waste leftover from degradation is excreted as well as processed by leukocytes. This processing allows key antigens to be presented on the cell surface for adaptive immune responses.

Leukocyte: Pathogen Degradation

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