Plasma cell with distinct
clear perinuclear region
of the cytoplasm
containing a large
number of Golgi bodies
Reticuloendothelial cells are phagocytic; i.e., they can
engulf and destroy bacteria, viruses, and other foreign
A histiocyte is an animal cell that is part of the mononuclear
phagocyte system (also known as the reticuloendothelial
system or lymphoreticular system). The mononuclear
phagocytic system is part of the organism's immune system.
The histiocyte is a tissue macrophage or a dendritic cell.
A giant cell is a mass formed by the union of several
distinct cells (usually macrophages).It can arise in
response to an infection, such as from tuberculosis,
herpes, or HIV, or foreign body.
Are activated macrophages resembling epithelial cells
elongated, with finely granular, pale eosinophilic (pink)
cytoplasm and central, ovoid nucleus (oval or
elongate), which is less dense than that of a lymphocyte
Heart: fibrinous pericarditis
This is a classic example
the visceral pericardium
(“bread and butter”
inflammation is due to
permeability leading to
the leakage of a sterile
exudate with fibrin on to
the surface of the heart.