immune system

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a system (including the thymus and bone marrow and lymphoid tissues) that protects the body from foreign substances and pathogenic organisms by producing the immune response
• Hypernyms:
system
• Part Meronyms:
marrow, bone marrow, thymus gland, thymus, lymph node,
lymph gland, node, reticuloendothelial system, RES