cold war in British English. See all translations. uk â /ËkÉÊld ËwÉËr/ us â /ËkoÊld ËwÉËr/. âº a state of extreme unfriendliness existing between countries, especially countries with opposing political systems, that expresses itself not through fighting but through political pressure and threats.
The spleen is the largest organ of the lymphatic system. Its primary function is to filter blood of damaged cells, cellular debris, and pathogens. Like the thymus, the spleen houses and aids in the maturation of lymphocytes. Lymphocytes destroy pathogens and dead cells in the blood.
Two bean-shaped organs located in the middle back that filter blood and remove wastes that are diverted to the urinary bladder in the form of urine. In the kidney, network of capillaries that performs the first step of filtering blood in the nephron. Tubular structure in the kidney that filters blood to form urine.