biology facttss on Instagram: "Killer T cells, also known as cytotoxic T lymphocytes (CTLs), play a crucial role in the immune system’s defense against cancer by directly inducing apoptosis in malignant cells. These specialized immune cells recognize cancer cells through the interaction between their T-cell receptors and specific tumor antigens presented on the surface of cancer cells by MHC class I molecules. Once this precise recognition occurs, the killer T cell forms a tight contact with the