#thymus_gland__thymus  a ductless glandular organ at the base of the neck that produces lymphocytes and aids in producing immunity; atrophies with age
  supertype:  endocrine_gland__endocrinegland__ductless_gland  any of the glands of the endocrine system that secrete hormones directly into the bloodstream
  part of:  immune_system  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
  part of:  cervix__neck  the part of an organism that connects the head to the rest of the body; "he admired her long graceful neck"
     part of:  body__organic_structure__organicstructure__physical_structure  the entire physical structure of an organism (especially an animal or human being); "he felt as if his whole body were on fire"

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