2,3,7,8-tetrachlorodibenzo-p-dioxin ( tcdd ) and its congeners , such as 3,3',4,4'-tetrachlorobiphenyl ( tcb ) and 3,3',4,4'-tetrachloroazoxybenzene ( tcaob ) , act on targets in the immune system , probably by interacting with the ah-receptor , causing a characteristic pattern of effects typified by inhibition of lymphoid development in the thymus .
C0020962
immune system
C0040113
thymus