Their role in immune system is crucial because<unk> s provide a first line of defense at this extensive barrier with the outside world. All<unk>  T cells are antigen-experienced T cells, which typically display a cytotoxic functional phenotype.<unk> s mediate antigen-specific delayed-type hypersensitivity (DTH) responses, exhibit virus-specific CTL function, to express natural killer (NK)-like activity and produce a local graft-versus-host reaction (GVHR) when transferred to semiallogeneic hosts.<unk> s are also able to produce a variety of cytokines which are characteristically produced by Th1- and Th2-type cells and can also provide help for B cell responses.
Intraepithelial lymphocyte
Tingible body macrophage
Tumor-infiltrating lymphocytes
Lutzner cells
Lipid-laden alveolar macrophage
Touton giant cell
Langhans giant cell
Hypersegmented neutrophil