The three kind of landforms found on Earth are mountains, plains and plateaus. Mountains are natural topographical features that may reach great heights, while plains and plateaus are lower, longer...
leukemia leuÂ·keÂ·miÂ·a (lÅÅ-kÄ'mÄ-É) n. Any of various acute or chronic neoplastic diseases of the bone marrow in which unrestrained proliferation of white blood cells occurs and which is usually accompanied by anemia, impaired blood clotting, and enlargement of the lymph nodes, liver, and spleen.
Leukemia usually refers to cancer of the white blood cells. It tends to affect one of the two major types of white blood cells: lymphocytes and granulocytes. These cells circulate through the bloodstream and the lymph system to help the body fight off viruses, infections, and other invading organisms.