MICROANATOMY

Detailed explanation-1: -Cytotoxic T cells kill infected cells, whereas helper T cells help activate macrophages, B cells, and cytotoxic T cells. Effector helper T cells secrete a variety of signal proteins called cytokines, which act as local mediators.

Detailed explanation-2: -T Lymphocytes: Cell-mediated Immunity Cytotoxic (killer) T cells-destroy host cells bearing foreign antigen (e.g., host cells invaded by viruses and cancer cells) Helper T cells-enhance development of B cells into antibody-secreting cells & enhance activity of cytotoxic & suppressor T cells.

Detailed explanation-3: -White blood cells are the key players in your immune system. They are made in your bone marrow and are part of the lymphatic system. White blood cells move through blood and tissue throughout your body, looking for foreign invaders (microbes) such as bacteria, viruses, parasites and fungi.

Detailed explanation-4: -Cytotoxic T lymphocytes, natural killer (NK) cells and antiviral macrophages can recognize and kill virus-infected cells. Helper T cells can recognize virus-infected cells and produce a number of important cytokines.

Detailed explanation-5: -T cells can wipe out infected or cancerous cells. They also direct the immune response by helping B lymphocytes to eliminate invading pathogens.