what is the target tissue of t  lymphocytes
More on T Lymphocytes â¢ T lymphocytes develop in the thymus. â¢ The cells with a CD4 marker are called helper T cells (Th cells). The CD8 positive cells that develop are cytotoxic T cells (Tc cells). â¢ Each T cell has a TCR: a transmembrane heterodimer composed of two polypeptide chains. The TCR specifically recognizes antigen.