Term: 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
Broader: system: a group of physiologically or anatomically related organs or parts | Unrelated: faintness: a feeling of faintness and of being ready to swoon
Broader: system: a group of physiologically or anatomically related organs or parts | Unrelated: leu: the basic unit of money in Romania
Broader: system: a group of physiologically or anatomically related organs or parts | Unrelated: yellow-fever mosquito: mosquito that transmits yellow fever and dengue
Broader: system: a group of physiologically or anatomically related organs or parts | Unrelated: recrudescence: a return of something after a period of abatement
Broader: system: a group of physiologically or anatomically related organs or parts | Unrelated: run: a score in baseball made by a runner touching all four bases safely
Broader: system: a group of physiologically or anatomically related organs or parts | Unrelated: secretary of war: head of a former executive department; combined with the Navy Secretary to form the Defense Secretary in 1947
Broader: system: a group of physiologically or anatomically related organs or parts | Unrelated: road gang: a gang of road workers
Broader: system: a group of physiologically or anatomically related organs or parts | Unrelated: taste: a small amount eaten or drunk
Broader: system: a group of physiologically or anatomically related organs or parts | Unrelated: escort: an attendant who is employed to accompany someone
Broader: system: a group of physiologically or anatomically related organs or parts | Unrelated: nature study: the study of animals and plants in the natural world (usually at an elementary level)