T helper cells orchestrate the immune response by activating other cells like B cells (for antibodies) and killer T cells (CD8 ) to fight pathogens, while killer T cells directly destroy infected or cancerous cells, acting as the immune system’s assassins; both are crucial for adaptive immunity, but helper T cells are the central commanders, activating the cytotoxic response T Helper Cells (CD4 ) Role: The “managers” or “commanders” of the immune system, activating other immune cells. Function: