Which cells are known as "assassins" that mature in the thymus?

The cells referred to as "assassins" that mature in the thymus are T cells. This name is derived from their crucial role in the immune response, particularly in identifying and destroying infected host cells, as well as cancerous cells. T cells originate from the bone marrow but migrate to the thymus to undergo maturation, a process that involves the development of the T cell receptor. This receptor is essential for recognizing specific antigens presented by infected or abnormal cells.

During this maturation process, T cells also undergo selection processes to ensure that they can effectively distinguish between self and non-self antigens, which is critical for preventing autoimmune responses. Once they are fully developed, T cells circulate in the body and can quickly respond to pathogens or aberrant cells, fulfilling their role as assassins in the immune system. This is a fundamental aspect of adaptive immunity, where T cells play a pivotal role in memory and specificity against particular antigens.