immune system

Noun
  1. is a type of: system - a group of physiologically or anatomically related organs or parts
    has:
    • bone marrow, marrow - the fatty network of connective tissue that fills the cavities of bones
    • thymus, thymus gland - a ductless glandular organ at the base of the neck that produces lymphocytes and aids in producing immunity; atrophies with age
    • lymph gland, lymph node, node - the source of lymph and lymphocytes
    • res, reticuloendothelial system - a widely distributed system consisting of all the cells able to ingest bacteria or colloidal particles etc, except for certain white blood cells

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