Body cells that have been infected
Immune system is a complex arrangement of cells that functions as the eliminating system in the body by reconizing elements that are not safe in the body. A humoral and cellular can be differentiated. The key players of adaptive cellular immune responses are T lymphocytes. The effector cells are the cytotoxic T lymphocytes. These type of cells express t cell receptors that can recognize an antigen. This will allow them to attach and tag the antigen as a possible threat in the body.