capable of existence ends during protects immune system process fully formed stage multicellular organism immune system ZFA:0001159 AAO:0011003 BILA:0000104 MA:0002711 SCTID:362590003 FMA:9825 GAID:328 MESH:D007107 BTO:0005810 VHOG:0001247 TAO:0001159 NCIT:C12735 Wikipedia:Immune_system XAO:0003152 Anatomical system that protects the body from foreign substances, cells, and tissues by producing the immune response and that includes especially the thymus, spleen, lymphoid tissue, lymphocytes including the B cells and T cells, and antibodies. integumental system hepatobiliary system entire sense organ system non-connected functional system excretory system