why do immune cells doesn's usually recognise self cells?
hello,shreya!!
you know that there are two kinds of aggranulocyte which is basically responsible for providing adaptive immunity and these fights against foreign materials that is antigen,these are T-LYMPHOCYTES AND B-lymphocytes,b-lymphocyte is formed in bone marrow whereas t-lymhocyte is formed in bone marrow but it's maturation takes place in thymus during maturation these cells are taught to recognise self cells through MHC recognition,thus they know howmto differentiate.