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.
Comment:
[homology-note] "The antibody-based immune system defined by the presence of the major histocompatibility complex (MHC), T cell receptor (TCR), B cell receptor (BCR) or recombination activating genes (RAGs) is known beginning from jawed fishes.[well established][VHOG]" xsd:string {date_retrieved="2012-09-17", external_class="VHOG:0001247", ontology="VHOG", source="PMID:21046016 Dzik JM, The ancestry and cumulative evolution of immune reactions. Acta biochimica Polonica (2010)", source="http://bgee.unil.ch/"}