Final answer:
T cells are the primary cells that provide cellular immunity by directly attacking other cells to eliminate intracellular pathogens.
Step-by-step explanation:
T cells, which compromise about 80% of circulating lymphocytes, are the primary cells that provide cellular immunity. Cellular immunity involves the direct attack of T cells on other cells to eliminate intracellular pathogens. T cells also play a central role in coordinating the overall adaptive immune response. They are responsible for destruction of cells infected with intracellular pathogens, which is known as cell-mediated immunity.
T cells are immune system cells that target particular foreign particles. T cells circulate until they come into contact with their particular antigen, rather than attacking all antigens universally. T cells are therefore essential for protection against foreign toxins.