Phagocytosis

A. Description. Phagocytosis is the process by which the white blood cells to absorb and digest microorganisms [4].

1. Steps in phagocytosis

a. First, the exterior walls of the cells of phagocytic cells such as neutrophils, macrophages or adheres to bacteria (Fig. 8-10). Phagocytic cell extends finger-like projections (pseudopodia)that surround the bacteria.

B. Next, phagocytic bubble is called phagosome surrounds bacteria.

c. Lizosom granules fuse with bubbles forming phagolysosome.

d. The bacterium is digested in the phagolysosome.

e. Finally, phagocytic cell throws content phagolysosome into the surrounding tissue.

2. Local tissue destruction from phagocytosis

a. Lysosomal enzymes and other microbial products are exempt from leukocytes after phagocytosis or when leukocyte dies.

B. Released lysosomal enzymes to cause damage to tissues and cells in the same manner that they destroy the bacteria.