_________ screen body cells for aged,infected and,in some cases,malignant cells and,if such cells are detected,they are attacked and killed.

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Cytotoxic T lymphocytes screen body cells for aged, infected, and, in some cases, malignant cells and, if such cells are detected, they are attacked and killed. This process is known as cell-mediated immunity. Helper T lymphocytes assist in the immune response by activating other immune cells, while inhibitory T lymphocytes and regulatory T lymphocytes help to regulate and dampen the immune response. B lymphocytes are responsible for producing antibodies in response to foreign antigens.

_________ Screen Body Cells for Aged,infected And,in Some Cases,malignant Cells