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T-Helper Cells

Meaning

T-Helper Cells are a fundamental type of lymphocyte, a white blood cell, that plays a central, orchestrating role in the adaptive immune system, identifiable by the presence of the CD4 surface receptor. Their primary function is not to kill infected cells directly but to coordinate the immune response by recognizing foreign antigens presented by other immune cells and subsequently releasing signaling molecules called cytokines. They are critical mediators at the intersection of the immune and endocrine systems.