T Cell homing is the process by which T cells, a type of white blood cell, migrate to specific tissues in the body. This movement is crucial for the immune response, allowing T cells to reach areas where they are needed to fight infections or respond to inflammation. The homing process is guided by various signals, including chemokines and adhesion molecules. These signals help T cells recognize and bind to the blood vessel walls in target tissues, enabling them to exit the bloodstream and enter the affected area to perform their immune functions.