Definition & Meaning of "cytotoxic t cell"

What is a "cytotoxic t cell"?

A Cytotoxic T cell, also known as a "CD8+ T cell", is a crucial component of the immune system in the human body. These specialized immune cells play a vital role in eliminating infected or abnormal cells, such as those infected by viruses or cancerous cells. Cytotoxic T cells recognize specific antigens displayed on the surface of these target cells and release toxic substances to induce cell death, effectively clearing the body of harmful pathogens and abnormal cells. Their ability to selectively target and destroy infected or transformed cells makes cytotoxic T cells essential for immune defense and surveillance against diseases.