T-cytotoxic cells, also known as cytotoxic T lymphocytes (CTLs), are a type of white blood cell that play a crucial role in the immune system. They are responsible for identifying and destroying infected or cancerous cells. CTLs recognize specific antigens presented on the surface of these target cells, allowing them to initiate a targeted immune response. Once activated, T-cytotoxic cells release proteins that induce apoptosis, or programmed cell death, in the infected or abnormal cells. This process helps to eliminate threats to the body, maintaining overall health and preventing the spread of infections or tumors.