A special type of cell that is a key regulator of the
immune system, acting as a professional antigen-presenting cell (APC) capable of
activating naïve T cells and stimulating the growth and differentiation of B cells.
D endritic cells are found, for example, in the lymph nodes and spleen. As an
APC, a dendritic cell can retain antigen for long periods on its surface, present
the antigen to a T or B cell and so influence their behavior.
The word "dendritic" means "branched like a tree." It comes from the Greek "dendron"
(tree).
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