Helper T cells (Th)

Definition

Helper T cells are a type of white blood cell that play a crucial role in the body's immune response by activating and directing other immune cells. They recognize foreign antigens presented by antigen-presenting cells and help to activate both the humoral and cell-mediated immune responses.

Related terms

Antigen: presenting cells - Cells that process antigens and present them on their surface to be recognized by T cells, initiating an immune response.

Cytokines:

Small proteins released by cells, including helper T cells, that affect the behavior of other cells, often serving as signals in the immune system.

Immune response: The body's defensive reaction to foreign substances or pathogens involving recognition, mobilization, attack, and elimination processes mediated by various immune system components