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.
1 Blood and blood vessels - Blood and blood vessels explained. 2  The lymphatic system maintains fluid levels in the body. 3  Bacteria and other microbes are taken up by the lymph and delivered to the lymph nodes for destruction.  The spleen and thymus are organs that filter the blood.