2. The function of thymus a The thymus is the site of t cell maturation ■ Immune regulation Secrete cytokine and thymulin-like molecules Thymosin(胸腺素) thymulin-α(胸腺刺激素) thymopoietin(胸腺生成素) To promote the proliferation, differentiation of th oocytes
2. The function of thymus ◼ The thymus is the site of T cell maturation ◼ Immune regulation: Secrete cytokine and thymulin-like molecules Thymosin（胸腺素）， thymulin-（胸腺刺激素） thymopoietin（胸腺生成素） To promote the proliferation , differentiation of thymocytes
Bone marrow Thymus Cortex Medulla Periphery fetal liver CDB 微nY CD4 CD4- CD8' CD8 TCRorB TRAp Helper T lymphocyte CD4 CD8 Positive/Negative TROpe CD4 CDB+ <CD4*1 TRAps CD8% TCRaB low Cytolytic T lymphocyte CD4 CD8- CD4 CD8- CRYo, CD4 R? Selection CD8 CRYs* Function