CHAPTER 22 HEMICAL C - NCERT
differentiation of T-lymphocytes, which provide cell-mediated immunity. In addition, thymosins also promote production of antibodies to provide humoral immunity. Thymus is degenerated in old individuals resulting in a decreased production of thymosins. As a result, the immune responses of old persons bec ome weak. 22.2.7 Adrenal Gland
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